Hi,
Below is the nsenter output:

# ps -ef | grep tomcat
root      165217       1  1 10:22 ?        00:05:33 /usr/local/jre/bin/java 
-Djava.util.logging.config.file=/usr/local/apache-tomcat/conf/logging.properties
 -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -d64 -server 
-Xms1800m -Xmx8192m -XX:MaxMetaspaceSize=1800m 
-Djdk.tls.ephemeralDHKeySize=2048 
-Djava.protocol.handler.pkgs=org.apache.catalina.webresources 
-Dorg.apache.catalina.security.SecurityListener.UMASK=0027 
-Dignore.endorsed.dirs= -classpath 
/usr/local/apache-tomcat/bin/bootstrap.jar:/usr/local/apache-tomcat/bin/tomcat-juli.jar
 -Dcatalina.base=/usr/local/apache-tomcat 
-Dcatalina.home=/usr/local/apache-tomcat 
-Djava.io.tmpdir=/usr/local/apache-tomcat/temp 
org.apache.catalina.startup.Bootstrap start
root      167329  167268  0 18:00 pts/1    00:00:00 grep --color=auto tomcat

# nsenter -t 165217 --net lsof -n -p 165217 |less
COMMAND    PID USER   FD      TYPE             DEVICE SIZE/OFF     NODE NAME
java    165217 root  cwd       DIR                8,2     4096   157664 
/usr/local/freestor/bin
java    165217 root  rtd       DIR                8,3     4096        2 /
java    165217 root  txt       REG                8,2     8712     8913 
/usr/local/jdk/jre1.8.0_271/bin/java
java    165217 root  mem       REG                8,2   113371   160881 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/hibernate-jpa-2.1-api-1.0.0.Final.jar
java    165217 root  mem       REG                8,2   147874   160802 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/activemq-protobuf-1.1.jar
java    165217 root  mem       REG                8,2   391515   160836 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/lucene-queryparser-4.10.4.jar
java    165217 root  mem       REG                8,2   868615   160813 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/spring-context-3.2.17.RELEASE.jar
java    165217 root  mem       REG                8,2     9711   160792 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/slf4j-log4j12-1.6.6.jar
java    165217 root  mem       REG                8,2   196573   160819 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/spring-expression-3.2.17.RELEASE.jar
java    165217 root  mem       REG                8,2    97173   160843 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/lucene-misc-4.10.4.jar
java    165217 root  mem       REG                8,2    10074   160872 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/batik-ext-1.11.jar
java    165217 root  mem       REG                8,2    62983   160861 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/activation-1.1.jar
java    165217 root  mem       REG                8,2   371668   160812 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/spring-security-core-3.2.9.RELEASE.jar
java    165217 root  mem       REG                8,2   645914   160754 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/hibernate-entitymanager-4.3.5.Final.jar
java    165217 root  mem       REG                8,2   427030   160753 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/hibernate-envers-4.3.5.Final.jar
java    165217 root  mem       REG                8,2   256468   160829 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/barcode4j-2.0.jar
java    165217 root  mem       REG                8,2   489884   160846 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/log4j-1.2.17.jar
java    165217 root  mem       REG                8,2    29257   160798 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/slf4j-api-1.7.7.jar
java    165217 root  mem       REG                8,2   422612   160783 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/batik-awt-util-1.11.jar
java    165217 root  mem       REG                8,2    16519   160796 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/jcl-over-slf4j-1.7.7.jar
java    165217 root  mem       REG                8,2   322362   160851 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/cglib-nodep-2.2.jar
java    165217 root  mem       REG                8,2   864598   160848 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/castor-1.2.jar
java    165217 root  mem       REG                8,2   434678   160748 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/commons-lang3-3.4.jar
java    165217 root  mem       REG                8,2   325196   160785 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/batik-css-1.11.jar
java    165217 root  mem       REG                8,2  5230007   160755 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/hibernate-core-4.3.5.Final.jar
java    165217 root  mem       REG                8,2 14041249   160763 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/elasticsearch-1.7.5.jar
java    165217 root  mem       REG                8,2   206385   160749 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/spring-jms-3.2.17.RELEASE.jar
java    165217 root  mem       REG                8,2    64021   160837 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/lucene-join-4.10.4.jar
java    165217 root  mem       REG                8,2   714194   160828 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/javassist-3.18.1-GA.jar
java    165217 root  mem       REG                8,2   279193   160876 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/commons-lang-2.5.jar
java    165217 root  mem       REG                8,2    75311   160826 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/hibernate-commons-annotations-4.0.4.Final.jar
java    165217 root  mem       REG                8,2   436303   160745 
/usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/avro-1.7.7.jar
................
java    165217 root   73w     FIFO               0,13      0t0 16786125 pipe
java    165217 root   74u  a_inode               0,14        0    10970 
[eventpoll]
java    165217 root   75r     FIFO               0,13      0t0 16786126 pipe
java    165217 root   76w     FIFO               0,13      0t0 16786126 pipe
java    165217 root   77u  a_inode               0,14        0    10970 
[eventpoll]
java    165217 root   78u     sock                0,9      0t0 16961335 
protocol: TCPv6
java    165217 root   79r     FIFO               0,13      0t0 16786127 pipe
java    165217 root   80w     FIFO               0,13      0t0 16786127 pipe
java    165217 root   81u  a_inode               0,14        0    10970 
[eventpoll]
java    165217 root   82r     FIFO               0,13      0t0 16786128 pipe
java    165217 root   83w     FIFO               0,13      0t0 16786128 pipe
java    165217 root   84u  a_inode               0,14        0    10970 
[eventpoll]
java    165217 root   86r     FIFO               0,13      0t0 16786129 pipe
java    165217 root   87w     FIFO               0,13      0t0 16786129 pipe
java    165217 root   88u  a_inode               0,14        0    10970 
[eventpoll]
java    165217 root   89r     FIFO               0,13      0t0 16786130 pipe
java    165217 root   90w     FIFO               0,13      0t0 16786130 pipe
java    165217 root   91u  a_inode               0,14        0    10970 
[eventpoll]
java    165217 root   93u     IPv6           16786133      0t0      TCP 
127.0.0.1:mxi (LISTEN)
java    165217 root   94u     sock                0,9      0t0 16963075 
protocol: TCPv6
java    165217 root   96u     sock                0,9      0t0 16824649 
protocol: TCPv6
java    165217 root   97u     IPv6           17051898      0t0      TCP 
10.4.3.55:60204->172.22.22.192:https (ESTABLISHED)
java    165217 root   98u     sock                0,9      0t0 16824673 
protocol: TCPv6
java    165217 root   99u     sock                0,9      0t0 16824711 
protocol: TCPv6
java    165217 root  100u     sock                0,9      0t0 16893245 
protocol: TCPv6
java    165217 root  101u     sock                0,9      0t0 16824385 
protocol: TCPv6
java    165217 root  102u     sock                0,9      0t0 16824264 
protocol: TCPv6
java    165217 root  103u     sock                0,9      0t0 16824278 
protocol: TCPv6
java    165217 root  104u     sock                0,9      0t0 16824279 
protocol: TCPv6
java    165217 root  105u     sock                0,9      0t0 16824063 
protocol: TCPv6
java    165217 root  106u     sock                0,9      0t0 16823982 
protocol: TCPv6
java    165217 root  107u     sock                0,9      0t0 16823959 
protocol: TCPv6
java    165217 root  108r      CHR                1,8      0t0     1041 
/dev/random
java    165217 root  109u     sock                0,9      0t0 16778709 
protocol: TCPv6
java    165217 root  110w      REG                8,6 25506176  1835053 
/apps/apache-tomcat/logs/fms.log
java    165217 root  111w      REG                8,6   919042  1835019 
/apps/apache-tomcat/logs/obd.log
java    165217 root  112u     sock                0,9      0t0 16823821 
protocol: TCPv6
java    165217 root  113u     sock                0,9      0t0 16823822 
protocol: TCPv6
java    165217 root  114u     sock                0,9      0t0 16823633 
protocol: TCPv6
java    165217 root  115u     sock                0,9      0t0 16823527 
protocol: TCPv6
java    165217 root  116u     sock                0,9      0t0 16823489 
protocol: TCPv6
java    165217 root  117u     sock                0,9      0t0 16823490 
protocol: TCPv6
java    165217 root  118u     sock                0,9      0t0 16823491 
protocol: TCPv6
..................

Thanks

-----Original Message-----
From: André Warnier (tomcat/perl) <a...@ice-sa.com> 
Sent: Tuesday, May 25, 2021 12:42 PM
To: users@tomcat.apache.org
Subject: Re: apache-tomcat-8.5.59 too many open files on Linux 8

Hi.
The point is to try to figure out what these thousands of apparently "TCPv6" 
sockets 
belonging to the tomcat process actually are, so that we can maybe begin to 
look at where 
they may be coming from.
The trouble is, the lsof output so far did not really tell us what these "sock" 
things 
might be.

But there may be a clue here :
https://serverfault.com/questions/1000338/in-lsof-output-what-are-those-sock-lines
(about when things run in a container).
Is that your case ?
And if so, could you run the lsof command in the container, as they suggest ?

And the point of forcing a tomcat/JVM GC was this :
When you restart tomcat (actually the JVM which runs tomcat), the OS will clean 
up *all* 
the file descriptors belonging to that process, including the "legitimate" ones 
shown by 
netstat, and the "unknown" ones shown in addition by lsof.
Doing a GC, without stopping the JVM, would clean up *only* such sockets/fd 
that are held 
by objects which are discarded, but still sit on the heap awaiting a GC to 
really destroy 
them.  If your heap is very large, it may otherwise take a long while before 
such a GC 
happens, and such sockets could accumulate.
One way to trigger a GC is through JMX, but it takes a bit of additional setup 
to make 
that work. That's why I was asking if you had some method to do that.
(see : https://code.google.com/archive/p/jmxsh/)
But let's look at the lsof part first.



On 24.05.2021 16:09, Yeggy Javadi wrote:
> Hi,
> I restarted tomcat so PID has changed to 143152; I do not know how to trigger 
> tomcat GC, I just restart it to reset the lsof to 0.
> Please see outputs below:
> 
> # ps -ef | grep tomcat
> root      143152       1  0 May22 ?        00:26:44 /usr/local/jre/bin/java 
> -Djava.util.logging.config.file=/usr/local/apache-tomcat/conf/logging.properties
>  -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -d64 
> -server -Xms1800m -Xmx8192m -XX:MaxMetaspaceSize=1800m 
> -Djdk.tls.ephemeralDHKeySize=2048 
> -Djava.protocol.handler.pkgs=org.apache.catalina.webresources 
> -Dorg.apache.catalina.security.SecurityListener.UMASK=0027 
> -Dignore.endorsed.dirs= -classpath 
> /usr/local/apache-tomcat/bin/bootstrap.jar:/usr/local/apache-tomcat/bin/tomcat-juli.jar
>  -Dcatalina.base=/usr/local/apache-tomcat 
> -Dcatalina.home=/usr/local/apache-tomcat 
> -Djava.io.tmpdir=/usr/local/apache-tomcat/temp 
> org.apache.catalina.startup.Bootstrap start
> root      153962  153912  0 10:00 pts/1    00:00:00 grep --color=auto tomcat
> 
> # lsof -p 143152 | wc -l
> 41043
> 
> # lsof -p 143152 | grep "protocol: TCPv6"| wc -l
> 40487
> 
> # netstat -p -a -n --inet6 | grep 143152
> tcp6       0      0 :::8443                 :::*                    LISTEN    
>   143152/java
> tcp6       0      0 :::443                  :::*                    LISTEN    
>   143152/java
> tcp6       0      0 127.0.0.1:8005          :::*                    LISTEN    
>   143152/java
> tcp6       0      0 :::1099                 :::*                    LISTEN    
>   143152/java
> tcp6       0      0 :::80                   :::*                    LISTEN    
>   143152/java
> tcp6       0      0 :::36081                :::*                    LISTEN    
>   143152/java
> tcp6       0      0 10.4.3.55:60736         10.4.3.55:9300          
> ESTABLISHED 143152/java
> tcp6       0      0 10.4.3.55:60732         10.4.3.55:9300          
> ESTABLISHED 143152/java
> tcp6       0      0 10.4.3.55:60728         10.4.3.55:9300          
> ESTABLISHED 143152/java
> tcp6       0      0 10.4.3.55:80            10.197.255.10:55446     
> ESTABLISHED 143152/java
> tcp6       1      0 10.4.3.55:55958         10.4.3.55:11576         
> CLOSE_WAIT  143152/java
> tcp6       0      0 10.4.3.55:53682         172.22.21.48:443        
> ESTABLISHED 143152/java
> tcp6       0      0 127.0.0.1:48622         127.0.0.1:5432          
> ESTABLISHED 143152/java
> tcp6       0      0 10.4.3.55:60748         10.4.3.55:9300          
> ESTABLISHED 143152/java
> tcp6       1      0 10.4.3.55:55956         10.4.3.55:11576         
> CLOSE_WAIT  143152/java
> tcp6       0      0 10.4.3.55:40574         172.22.21.47:443        
> ESTABLISHED 143152/java
> tcp6       0      0 127.0.0.1:48620         127.0.0.1:5432          
> ESTABLISHED 143152/java
> tcp6       0      0 10.4.3.55:53782         172.22.21.48:443        
> ESTABLISHED 143152/java
> tcp6       0      1 10.4.3.55:49808         10.12.3.78:443          SYN_SENT  
>   143152/java
> tcp6       0      0 10.4.3.55:60730         10.4.3.55:9300          
> ESTABLISHED 143152/java
> tcp6       0      0 10.4.3.55:60750         10.4.3.55:9300          
> ESTABLISHED 143152/java
> tcp6       0      0 10.4.3.55:60742         10.4.3.55:9300          
> ESTABLISHED 143152/java
> tcp6       0      0 10.4.3.55:60746         10.4.3.55:9300          
> ESTABLISHED 143152/java
> tcp6       0      0 127.0.0.1:48624         127.0.0.1:5432          
> ESTABLISHED 143152/java
> tcp6       0      0 10.4.3.55:60734         10.4.3.55:9300          
> ESTABLISHED 143152/java
> tcp6       0      0 10.4.3.55:60226         172.22.22.192:443       
> ESTABLISHED 143152/java
> tcp6       0      0 127.0.0.1:52312         127.0.0.1:5432          
> ESTABLISHED 143152/java
> tcp6       0      0 127.0.0.1:57302         127.0.0.1:11753         
> ESTABLISHED 143152/java
> tcp6       0      0 10.4.3.55:60738         10.4.3.55:9300          
> ESTABLISHED 143152/java
> tcp6       0      0 10.4.3.55:60740         10.4.3.55:9300          
> ESTABLISHED 143152/java
> tcp6       0      0 10.4.3.55:80            10.197.255.10:55444     
> ESTABLISHED 143152/java
> tcp6       0      0 127.0.0.1:46976         127.0.0.1:9300          
> ESTABLISHED 143152/java
> tcp6       0      0 10.4.3.55:40540         172.22.21.47:443        
> ESTABLISHED 143152/java
> tcp6       0      0 127.0.0.1:52310         127.0.0.1:5432          
> ESTABLISHED 143152/java
> tcp6       0      0 10.4.3.55:60726         10.4.3.55:9300          
> ESTABLISHED 143152/java
> tcp6       0    669 10.4.3.55:60744         10.4.3.55:9300          
> ESTABLISHED 143152/java
> 
> # lsof -a -p 143152 -T s -i6
> COMMAND    PID USER   FD   TYPE   DEVICE SIZE/OFF NODE NAME
> java    143152 root   58u  IPv6 13816226      0t0  TCP *:http (LISTEN)
> java    143152 root   63u  IPv6 13816230      0t0  TCP *:https (LISTEN)
> java    143152 root   82u  IPv6 13816325      0t0  TCP 
> localhost.localdomain:mxi (LISTEN)
> java    143152 root   84u  IPv6 13874431      0t0  TCP 
> localhost.localdomain:52310->localhost.localdomain:postgres (ESTABLISHED)
> java    143152 root   86u  IPv6 13848367      0t0  TCP 
> localhost.localdomain:52312->localhost.localdomain:postgres (ESTABLISHED)
> java    143152 root  215u  IPv6 13822102      0t0  TCP 
> localhost.localdomain:48620->localhost.localdomain:postgres (ESTABLISHED)
> java    143152 root  216u  IPv6 13823064      0t0  TCP 
> localhost.localdomain:48624->localhost.localdomain:postgres (ESTABLISHED)
> java    143152 root  217u  IPv6 13821107      0t0  TCP 
> localhost.localdomain:48622->localhost.localdomain:postgres (ESTABLISHED)
> java    143152 root  269u  IPv6 13824001      0t0  TCP 
> localhost.localdomain:46976->localhost.localdomain:vrace (ESTABLISHED)
> java    143152 root  270u  IPv6 13787907      0t0  TCP 
> Yeggy-F8-FMSVA:60726->Yeggy-F8-FMSVA:vrace (ESTABLISHED)
> java    143152 root  271u  IPv6 13787908      0t0  TCP 
> Yeggy-F8-FMSVA:60728->Yeggy-F8-FMSVA:vrace (ESTABLISHED)
> java    143152 root  272u  IPv6 13787909      0t0  TCP 
> Yeggy-F8-FMSVA:60730->Yeggy-F8-FMSVA:vrace (ESTABLISHED)
> java    143152 root  273u  IPv6 13787910      0t0  TCP 
> Yeggy-F8-FMSVA:60732->Yeggy-F8-FMSVA:vrace (ESTABLISHED)
> java    143152 root  274u  IPv6 13787911      0t0  TCP 
> Yeggy-F8-FMSVA:60734->Yeggy-F8-FMSVA:vrace (ESTABLISHED)
> java    143152 root  275u  IPv6 13787912      0t0  TCP 
> Yeggy-F8-FMSVA:60736->Yeggy-F8-FMSVA:vrace (ESTABLISHED)
> java    143152 root  276u  IPv6 13787913      0t0  TCP 
> Yeggy-F8-FMSVA:60738->Yeggy-F8-FMSVA:vrace (ESTABLISHED)
> java    143152 root  277u  IPv6 13787914      0t0  TCP 
> Yeggy-F8-FMSVA:60740->Yeggy-F8-FMSVA:vrace (ESTABLISHED)
> java    143152 root  278u  IPv6 13787915      0t0  TCP 
> Yeggy-F8-FMSVA:60742->Yeggy-F8-FMSVA:vrace (ESTABLISHED)
> java    143152 root  279u  IPv6 13787916      0t0  TCP 
> Yeggy-F8-FMSVA:60744->Yeggy-F8-FMSVA:vrace (ESTABLISHED)
> java    143152 root  280u  IPv6 13787917      0t0  TCP 
> Yeggy-F8-FMSVA:60746->Yeggy-F8-FMSVA:vrace (ESTABLISHED)
> java    143152 root  281u  IPv6 13787918      0t0  TCP 
> Yeggy-F8-FMSVA:60748->Yeggy-F8-FMSVA:vrace (ESTABLISHED)
> java    143152 root  282u  IPv6 13787919      0t0  TCP 
> Yeggy-F8-FMSVA:60750->Yeggy-F8-FMSVA:vrace (ESTABLISHED)
> java    143152 root  293u  IPv6 13821122      0t0  TCP *:rmiregistry (LISTEN)
> java    143152 root  294u  IPv6 13816318      0t0  TCP *:36081 (LISTEN)
> java    143152 root  304u  IPv6 13787923      0t0  TCP *:pcsync-https (LISTEN)
> java    143152 root *740u  IPv6 15607907      0t0  TCP 
> Yeggy-F8-FMSVA:53366->172.22.21.48:https (ESTABLISHED)
> java    143152 root *876u  IPv6 15608779      0t0  TCP 
> Yeggy-F8-FMSVA:40328->172.22.21.47:https (ESTABLISHED)
> java    143152 root *881u  IPv6 15614275      0t0  TCP 
> Yeggy-F8-FMSVA:59970->172.22.22.192:https (ESTABLISHED)
> java    143152 root *882u  IPv6 15558639      0t0  TCP 
> Yeggy-F8-FMSVA:53526->172.22.21.48:https (ESTABLISHED)
> java    143152 root *067u  IPv6 15602583      0t0  TCP 
> Yeggy-F8-FMSVA:http->10.197.255.10:55037 (ESTABLISHED)
> java    143152 root *070u  IPv6 15602586      0t0  TCP 
> Yeggy-F8-FMSVA:40318->Yeggy-F8-FMSVA:36081 (ESTABLISHED)
> java    143152 root *073u  IPv6 15602582      0t0  TCP 
> Yeggy-F8-FMSVA:http->10.197.255.10:55036 (ESTABLISHED)
> java    143152 root *080u  IPv6 15512947      0t0  TCP 
> Yeggy-F8-FMSVA:55956->Yeggy-F8-FMSVA:11576 (CLOSE_WAIT)
> java    143152 root *081u  IPv6 15512948      0t0  TCP 
> Yeggy-F8-FMSVA:55958->Yeggy-F8-FMSVA:11576 (CLOSE_WAIT)
> java    143152 root *817u  IPv6 15611323      0t0  TCP 
> Yeggy-F8-FMSVA:36081->Yeggy-F8-FMSVA:40318 (ESTABLISHED)
> java    143152 root *818u  IPv6 15602584      0t0  TCP 
> Yeggy-F8-FMSVA:http->10.197.255.10:55039 (ESTABLISHED)
> 
> Thank
> 
> -----Original Message-----
> From: André Warnier (tomcat/perl) <a...@ice-sa.com>
> Sent: Sunday, May 23, 2021 6:30 PM
> To: users@tomcat.apache.org
> Subject: Re: apache-tomcat-8.5.59 too many open files on Linux 8
> 
> Hi.
> 
> I have no idea what lines like this are :
>> java    130244 root   78u     sock                0,9      0t0 12154374 
>> protocol: TCPv6
> 
> There are obviously too many of them, for them to match with the sockets 
> listed by netstat.
> 
> The ones which in the lsof output, have "TYPE" set to "IPv6" seem to 
> correspond to the
> ones marked as "LISTEN" in the netstat output.
> But the ones with TYPE="sock" and NAME="protocol: TCPv6" are a mystery to me.
> 
> Could you redo a netstat as follows :
> # netstat -p -a -n --inet6 | grep 130244
> 
> and can you also try this form of lsof :
> # lsof -a -p 130244 -T s -i6
> 
> And finally (after copying the result of the above) : do you know how to 
> trigger a GC
> (Garbage Collection) in your tomcat JVM ?
> (the point is to see if when a GC happens, these things disappear).
> 
> 
> On 22.05.2021 18:03, Yeggy Javadi wrote:
>> Here it is:
>>
>> # netstat -p -a  --tcp | grep 130244
>> tcp6       0      0 [::]:pcsync-https       [::]:*                  LISTEN   
>>    130244/java
>> tcp6       0      0 [::]:https              [::]:*                  LISTEN   
>>    130244/java
>> tcp6       0      0 [::]:37537              [::]:*                  LISTEN   
>>    130244/java
>> tcp6       0      0 localhost.localdoma:mxi [::]:*                  LISTEN   
>>    130244/java
>> tcp6       0      0 [::]:8009               [::]:*                  LISTEN   
>>    130244/java
>> tcp6       0      0 [::]:rmiregistry        [::]:*                  LISTEN   
>>    130244/java
>> tcp6       0      0 [::]:http               [::]:*                  LISTEN   
>>    130244/java
>> tcp6      86      0 Yeggy-F8-FMSVA:39680    172.22.22.192:https     
>> CLOSE_WAIT  130244/java
>> tcp6       0      1 Yeggy-F8-FMSVA:53618    10.12.3.78:https        SYN_SENT 
>>    130244/java
>> tcp6       0      0 Yeggy-F8-FMSVA:54772    Yeggy-F8-FMSVA:vrace    
>> ESTABLISHED 130244/java
>> tcp6       0      0 localhost.localdo:42664 localhost.loca:postgres 
>> ESTABLISHED 130244/java
>> tcp6       0      0 Yeggy-F8-FMSVA:54782    Yeggy-F8-FMSVA:vrace    
>> ESTABLISHED 130244/java
>> tcp6       0      0 Yeggy-F8-FMSVA:54766    Yeggy-F8-FMSVA:vrace    
>> ESTABLISHED 130244/java
>> tcp6       0      0 localhost.localdo:42662 localhost.loca:postgres 
>> ESTABLISHED 130244/java
>> tcp6       0      0 Yeggy-F8-FMSVA:54778    Yeggy-F8-FMSVA:vrace    
>> ESTABLISHED 130244/java
>> tcp6       0      0 Yeggy-F8-FMSVA:54788    Yeggy-F8-FMSVA:vrace    
>> ESTABLISHED 130244/java
>> tcp6       0      0 Yeggy-F8-FMSVA:54770    Yeggy-F8-FMSVA:vrace    
>> ESTABLISHED 130244/java
>> tcp6       0      0 Yeggy-F8-FMSVA:54790    Yeggy-F8-FMSVA:vrace    
>> ESTABLISHED 130244/java
>> tcp6       0      0 Yeggy-F8-FMSVA:54776    Yeggy-F8-FMSVA:vrace    
>> ESTABLISHED 130244/java
>> tcp6       0      0 Yeggy-F8-FMSVA:54786    Yeggy-F8-FMSVA:vrace    
>> ESTABLISHED 130244/java
>> tcp6       0      0 Yeggy-F8-FMSVA:54780    Yeggy-F8-FMSVA:vrace    
>> ESTABLISHED 130244/java
>> tcp6       0      0 localhost.localdo:45736 localhost.loca:postgres 
>> ESTABLISHED 130244/java
>> tcp6       0      0 Yeggy-F8-FMSVA:54768    Yeggy-F8-FMSVA:vrace    
>> ESTABLISHED 130244/java
>> tcp6       0      0 Yeggy-F8-FMSVA:54784    Yeggy-F8-FMSVA:vrace    
>> ESTABLISHED 130244/java
>> tcp6       0      0 localhost.localdo:42660 localhost.loca:postgres 
>> ESTABLISHED 130244/java
>> tcp6       0      1 Yeggy-F8-FMSVA:42922    10.12.3.77:https        SYN_SENT 
>>    130244/java
>> tcp6       0      0 Yeggy-F8-FMSVA:35794    172.22.22.192:https     
>> ESTABLISHED 130244/java
>> tcp6       0      0 Yeggy-F8-FMSVA:54774    Yeggy-F8-FMSVA:vrace    
>> ESTABLISHED 130244/java
>> tcp6       0      0 localhost.localdo:45734 localhost.loca:postgres 
>> ESTABLISHED 130244/java
>> tcp6       0      0 localhost.localdo:41016 localhost.localdo:vrace 
>> ESTABLISHED 130244/java
>>
>>
>> # lsof -p 130244
>> COMMAND    PID USER   FD      TYPE             DEVICE SIZE/OFF     NODE NAME
>> java    130244 root  cwd       DIR                8,2     4096   157664 
>> /usr/local/freestor/bin
>> java    130244 root  rtd       DIR                8,3     4096        2 /
>> java    130244 root  txt       REG                8,2     8712     8913 
>> /usr/local/jdk/jre1.8.0_271/bin/java
>> java    130244 root  mem       REG                8,2   498864     9007 
>> /usr/local/jdk/jre1.8.0_271/lib/amd64/libfontmanager.so
>> java    130244 root  mem       REG                8,2    39176     9006 
>> /usr/local/jdk/jre1.8.0_271/lib/amd64/libawt_headless.so
>> java    130244 root  mem       REG                8,2   759184     8996 
>> /usr/local/jdk/jre1.8.0_271/lib/amd64/libawt.so
>> java    130244 root  mem       REG                8,2  3559360     9139 
>> /usr/local/jdk/jre1.8.0_271/lib/resources.jar
>> java    130244 root  mem       REG                8,2    99680   133076 
>> /usr/lib64/libgcc_s-8-20191121.so.1
>> java    130244 root  mem       REG                8,2  3135658     9133 
>> /usr/local/jdk/jre1.8.0_271/lib/charsets.jar
>> java    130244 root  mem       REG                8,2   283368     8980 
>> /usr/local/jdk/jre1.8.0_271/lib/amd64/libsunec.so
>> java    130244 root  mem       REG                8,2  1907341     9138 
>> /usr/local/jdk/jre1.8.0_271/lib/jsse.jar
>> java    130244 root  mem       REG                8,2   285868     9126 
>> /usr/local/jdk/jre1.8.0_271/lib/ext/sunjce_provider.jar
>> java    130244 root  mem       REG                8,2    43191     9125 
>> /usr/local/jdk/jre1.8.0_271/lib/ext/sunec.jar
>> java    130244 root  mem       REG                8,2   283206     9127 
>> /usr/local/jdk/jre1.8.0_271/lib/ext/sunpkcs11.jar
>> java    130244 root  mem       REG                8,2   118047     9136 
>> /usr/local/jdk/jre1.8.0_271/lib/jce.jar
>> java    130244 root  mem       REG                8,2  1179462     9128 
>> /usr/local/jdk/jre1.8.0_271/lib/ext/localedata.jar
>> java    130244 root  mem       REG                8,2  3860563     9129 
>> /usr/local/jdk/jre1.8.0_271/lib/ext/cldrdata.jar
>> java    130244 root  mem       REG                8,2    51984     8995 
>> /usr/local/jdk/jre1.8.0_271/lib/amd64/libmanagement.so
>> java    130244 root  mem       REG                8,2    12373     8871 
>> /usr/local/apache-tomcat-8.5.59/lib/annotations-api.jar
>> java    130244 root  mem       REG                8,2   169952     8868 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-util.jar
>> java    130244 root  mem       REG                8,2   168382     8867 
>> /usr/local/apache-tomcat-8.5.59/lib/jasper-el.jar
>> java    130244 root  mem       REG                8,2   244451     8862 
>> /usr/local/apache-tomcat-8.5.59/lib/servlet-api.jar
>> java    130244 root  mem       REG                8,2   148761     8881 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-jdbc.jar
>> java    130244 root  mem       REG                8,2    62004     8863 
>> /usr/local/apache-tomcat-8.5.59/lib/jsp-api.jar
>> java    130244 root  mem       REG                8,2  2450404     8864 
>> /usr/local/apache-tomcat-8.5.59/lib/ecj-4.6.3.jar
>> java    130244 root  mem       REG                8,2    34798     8873 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-jni.jar
>> java    130244 root  mem       REG                8,2    78087     8886 
>> /usr/local/apache-tomcat-8.5.59/lib/catalina-storeconfig.jar
>> java    130244 root  mem       REG                8,2    89695     8877 
>> /usr/local/apache-tomcat-8.5.59/lib/el-api.jar
>> java    130244 root  mem       REG                8,2   599431     8884 
>> /usr/local/apache-tomcat-8.5.59/lib/jasper.jar
>> java    130244 root  mem       REG                8,2   174393     8870 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-i18n-ja.jar
>> java    130244 root  mem       REG                8,2   294856     8861 
>> /usr/local/apache-tomcat-8.5.59/lib/catalina-tribes.jar
>> java    130244 root  mem       REG                8,2   173282     8880 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-i18n-ko.jar
>> java    130244 root  mem       REG                8,2   284036     8872 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-dbcp.jar
>> java    130244 root  mem       REG                8,2    72656     8865 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-i18n-de.jar
>> java    130244 root  mem       REG                8,2    54667     8878 
>> /usr/local/apache-tomcat-8.5.59/lib/catalina-ant.jar
>> java    130244 root  mem       REG                8,2  1705863     8860 
>> /usr/local/apache-tomcat-8.5.59/lib/catalina.jar
>> java    130244 root  mem       REG                8,2    38241     8882 
>> /usr/local/apache-tomcat-8.5.59/lib/websocket-api.jar
>> java    130244 root  mem       REG                8,2   106051     8869 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-i18n-es.jar
>> java    130244 root  mem       REG                8,2   120073     8876 
>> /usr/local/apache-tomcat-8.5.59/lib/catalina-ha.jar
>> java    130244 root  mem       REG                8,2   228391     8879 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-websocket.jar
>> java    130244 root  mem       REG                8,2   868336     8888 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-coyote.jar
>> java    130244 root  mem       REG                8,2   215400     8874 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-util-scan.jar
>> java    130244 root  mem       REG                8,2   155094     8866 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-i18n-fr.jar
>> java    130244 root  mem       REG                8,2    26872     8885 
>> /usr/local/apache-tomcat-8.5.59/lib/jaspic-api.jar
>> java    130244 root  mem       REG                8,2   113008     8989 
>> /usr/local/jdk/jre1.8.0_271/lib/amd64/libnet.so
>> java    130244 root  mem       REG                8,2    93872     9003 
>> /usr/local/jdk/jre1.8.0_271/lib/amd64/libnio.so
>> java    130244 root  mem       REG                8,2   337024   395971 
>> /usr/lib/locale/en_US.utf8/LC_CTYPE
>> java    130244 root  mem       REG                8,2  2586930   390297 
>> /usr/lib/locale/en_US.utf8/LC_COLLATE
>> java    130244 root  mem       REG                8,2    10673     8887 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-api.jar
>> java    130244 root  mem       REG                8,2    38561     8875 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-i18n-ru.jar
>> java    130244 root  mem       REG                8,2   158590     8883 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-i18n-zh-CN.jar
>> java    130244 root  mem       REG                8,2    51205     8857 
>> /usr/local/apache-tomcat-8.5.59/bin/tomcat-juli.jar
>> java    130244 root  mem       REG                8,2    25287     8835 
>> /usr/local/apache-tomcat-8.5.59/bin/commons-daemon.jar
>> java    130244 root  mem       REG                8,2    36132     8837 
>> /usr/local/apache-tomcat-8.5.59/bin/bootstrap.jar
>> java    130244 root  mem       REG                8,2       54   395975 
>> /usr/lib/locale/en_US.utf8/LC_NUMERIC
>> java    130244 root  mem       REG                8,2     3316   521695 
>> /usr/lib/locale/en_US.utf8/LC_TIME
>> java    130244 root  mem       REG                8,2      286   521693 
>> /usr/lib/locale/en_US.utf8/LC_MONETARY
>> java    130244 root  mem       REG                8,2    26998   130155 
>> /usr/lib64/gconv/gconv-modules.cache
>> java    130244 root  mem       REG                8,2 67053209     9140 
>> /usr/local/jdk/jre1.8.0_271/lib/rt.jar
>> java    130244 root  mem       REG                8,2   127016     8988 
>> /usr/local/jdk/jre1.8.0_271/lib/amd64/libzip.so
>> java    130244 root  mem       REG                8,2    76880   133068 
>> /usr/lib64/libnss_files-2.28.so
>> java    130244 root  mem       REG                8,3  9253600   129922 
>> /var/lib/sss/mc/passwd
>> java    130244 root  mem       REG                8,2    46432   134002 
>> /usr/lib64/libnss_sss.so.2
>> java    130244 root  mem       REG                8,2   231960     8986 
>> /usr/local/jdk/jre1.8.0_271/lib/amd64/libjava.so
>> java    130244 root  mem       REG                8,2    66112     8975 
>> /usr/local/jdk/jre1.8.0_271/lib/amd64/libverify.so
>> java    130244 root  mem       REG                8,2    68944   133091 
>> /usr/lib64/librt-2.28.so
>> java    130244 root  mem       REG                8,2  2191808   133023 
>> /usr/lib64/libm-2.28.so
>> java    130244 root  mem       REG                8,2 17108824     8969 
>> /usr/local/jdk/jre1.8.0_271/lib/amd64/server/libjvm.so
>> java    130244 root  mem       REG                8,2  3154704   129871 
>> /usr/lib64/libc-2.28.so
>> java    130244 root  mem       REG                8,2    28968   133013 
>> /usr/lib64/libdl-2.28.so
>> java    130244 root  mem       REG                8,2   108616     8973 
>> /usr/local/jdk/jre1.8.0_271/lib/amd64/jli/libjli.so
>> java    130244 root  mem       REG                8,2   321552   133079 
>> /usr/lib64/libpthread-2.28.so
>> java    130244 root  mem       REG                8,2   252280   129864 
>> /usr/lib64/ld-2.28.so
>> java    130244 root  mem       REG                8,3    32768       18 
>> /tmp/hsperfdata_root/130244
>> java    130244 root  mem       REG                8,2       57   395973 
>> /usr/lib/locale/en_US.utf8/LC_MESSAGES/SYS_LC_MESSAGES
>> java    130244 root  mem       REG                8,2       34   390317 
>> /usr/lib/locale/en_US.utf8/LC_PAPER
>> java    130244 root  mem       REG                8,2       77   395974 
>> /usr/lib/locale/en_US.utf8/LC_NAME
>> java    130244 root  mem       REG                8,2      167   519390 
>> /usr/lib/locale/en_US.utf8/LC_ADDRESS
>> java    130244 root  mem       REG                8,2       59   521694 
>> /usr/lib/locale/en_US.utf8/LC_TELEPHONE
>> java    130244 root  mem       REG                8,2       23   521692 
>> /usr/lib/locale/en_US.utf8/LC_MEASUREMENT
>> java    130244 root  mem       REG                8,2      368   521691 
>> /usr/lib/locale/en_US.utf8/LC_IDENTIFICATION
>> java    130244 root    0r      CHR                1,3      0t0     1037 
>> /dev/null
>> java    130244 root    1w      REG                8,6   394654  1835011 
>> /apps/apache-tomcat/logs/catalina.out
>> java    130244 root    2w      REG                8,6   394654  1835011 
>> /apps/apache-tomcat/logs/catalina.out
>> java    130244 root    3r      REG                8,3  9253600   129922 
>> /var/lib/sss/mc/passwd
>> java    130244 root    4u     unix 0xffff985d1bd7b180      0t0 11980864 
>> type=STREAM
>> java    130244 root    5r      REG                8,2 67053209     9140 
>> /usr/local/jdk/jre1.8.0_271/lib/rt.jar
>> java    130244 root    6r      REG                8,2    36132     8837 
>> /usr/local/apache-tomcat-8.5.59/bin/bootstrap.jar
>> java    130244 root    7r      REG                8,2    25287     8835 
>> /usr/local/apache-tomcat-8.5.59/bin/commons-daemon.jar
>> java    130244 root    8r      REG                8,2    51205     8857 
>> /usr/local/apache-tomcat-8.5.59/bin/tomcat-juli.jar
>> java    130244 root    9w      REG                8,6    21883  1835065 
>> /apps/apache-tomcat/logs/catalina.2021-05-20.log
>> java    130244 root   10w      REG                8,6      761  1835066 
>> /apps/apache-tomcat/logs/localhost.2021-05-20.log
>> java    130244 root   11w      REG                8,6        0  1835067 
>> /apps/apache-tomcat/logs/manager.2021-05-20.log
>> java    130244 root   12w      REG                8,6        0  1835068 
>> /apps/apache-tomcat/logs/host-manager.2021-05-20.log
>> java    130244 root   13r      REG                8,2   158590     8883 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-i18n-zh-CN.jar
>> java    130244 root   14r      REG                8,2    38561     8875 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-i18n-ru.jar
>> java    130244 root   15r      REG                8,2    26872     8885 
>> /usr/local/apache-tomcat-8.5.59/lib/jaspic-api.jar
>> java    130244 root   16r      REG                8,2   155094     8866 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-i18n-fr.jar
>> java    130244 root   17r      REG                8,2   215400     8874 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-util-scan.jar
>> java    130244 root   18r      REG                8,2   868336     8888 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-coyote.jar
>> java    130244 root   19r      REG                8,2   228391     8879 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-websocket.jar
>> java    130244 root   20r      REG                8,2   120073     8876 
>> /usr/local/apache-tomcat-8.5.59/lib/catalina-ha.jar
>> java    130244 root   21r      REG                8,2   106051     8869 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-i18n-es.jar
>> java    130244 root   22r      REG                8,2    38241     8882 
>> /usr/local/apache-tomcat-8.5.59/lib/websocket-api.jar
>> java    130244 root   23r      REG                8,2  1705863     8860 
>> /usr/local/apache-tomcat-8.5.59/lib/catalina.jar
>> java    130244 root   24r      REG                8,2    54667     8878 
>> /usr/local/apache-tomcat-8.5.59/lib/catalina-ant.jar
>> java    130244 root   25r      REG                8,2    72656     8865 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-i18n-de.jar
>> java    130244 root   26r      REG                8,2   284036     8872 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-dbcp.jar
>> java    130244 root   27r      REG                8,2    10673     8887 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-api.jar
>> java    130244 root   28r      REG                8,2   173282     8880 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-i18n-ko.jar
>> java    130244 root   29r      REG                8,2   294856     8861 
>> /usr/local/apache-tomcat-8.5.59/lib/catalina-tribes.jar
>> java    130244 root   30r      REG                8,2   174393     8870 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-i18n-ja.jar
>> java    130244 root   31r      REG                8,2   599431     8884 
>> /usr/local/apache-tomcat-8.5.59/lib/jasper.jar
>> java    130244 root   32r      REG                8,2    89695     8877 
>> /usr/local/apache-tomcat-8.5.59/lib/el-api.jar
>> java    130244 root   33r      REG                8,2    78087     8886 
>> /usr/local/apache-tomcat-8.5.59/lib/catalina-storeconfig.jar
>> java    130244 root   34r      REG                8,2    34798     8873 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-jni.jar
>> java    130244 root   35r      REG                8,2  2450404     8864 
>> /usr/local/apache-tomcat-8.5.59/lib/ecj-4.6.3.jar
>> java    130244 root   36r      REG                8,2    62004     8863 
>> /usr/local/apache-tomcat-8.5.59/lib/jsp-api.jar
>> java    130244 root   37r      REG                8,2   148761     8881 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-jdbc.jar
>> java    130244 root   38r      REG                8,2   244451     8862 
>> /usr/local/apache-tomcat-8.5.59/lib/servlet-api.jar
>> java    130244 root   39r      REG                8,2   168382     8867 
>> /usr/local/apache-tomcat-8.5.59/lib/jasper-el.jar
>> java    130244 root   40r      REG                8,2   169952     8868 
>> /usr/local/apache-tomcat-8.5.59/lib/tomcat-util.jar
>> java    130244 root   41r      REG                8,2    12373     8871 
>> /usr/local/apache-tomcat-8.5.59/lib/annotations-api.jar
>> java    130244 root   42r      REG                8,2  1907341     9138 
>> /usr/local/jdk/jre1.8.0_271/lib/jsse.jar
>> java    130244 root   43r      REG                8,2  3860563     9129 
>> /usr/local/jdk/jre1.8.0_271/lib/ext/cldrdata.jar
>> java    130244 root   44u     unix 0xffff985d1bd7a400      0t0 11980871 
>> type=STREAM
>> java    130244 root   45r      REG                8,2  1179462     9128 
>> /usr/local/jdk/jre1.8.0_271/lib/ext/localedata.jar
>> java    130244 root   46r      CHR                1,8      0t0     1041 
>> /dev/random
>> java    130244 root   47r      CHR                1,9      0t0     1042 
>> /dev/urandom
>> java    130244 root   48r      CHR                1,8      0t0     1041 
>> /dev/random
>> java    130244 root   49r      CHR                1,8      0t0     1041 
>> /dev/random
>> java    130244 root   50r      CHR                1,9      0t0     1042 
>> /dev/urandom
>> java    130244 root   51r      CHR                1,9      0t0     1042 
>> /dev/urandom
>> java    130244 root   52r      REG                8,2   118047     9136 
>> /usr/local/jdk/jre1.8.0_271/lib/jce.jar
>> java    130244 root   53r      REG                8,2   283206     9127 
>> /usr/local/jdk/jre1.8.0_271/lib/ext/sunpkcs11.jar
>> java    130244 root   54r      REG                8,2    43191     9125 
>> /usr/local/jdk/jre1.8.0_271/lib/ext/sunec.jar
>> java    130244 root   55r      REG                8,2   285868     9126 
>> /usr/local/jdk/jre1.8.0_271/lib/ext/sunjce_provider.jar
>> java    130244 root   56r      REG                8,2  3559360     9139 
>> /usr/local/jdk/jre1.8.0_271/lib/resources.jar
>> java    130244 root   57r      REG                8,2  3135658     9133 
>> /usr/local/jdk/jre1.8.0_271/lib/charsets.jar
>> java    130244 root   58u     IPv6           11980876      0t0      TCP 
>> *:http (LISTEN)
>> java    130244 root   59u     unix 0xffff985d1bd7e780      0t0 11980877 
>> type=STREAM
>> java    130244 root   60r     FIFO               0,13      0t0 11980879 pipe
>> java    130244 root   61w     FIFO               0,13      0t0 11980879 pipe
>> java    130244 root   62u  a_inode               0,14        0    10970 
>> [eventpoll]
>> java    130244 root   63u     IPv6           11980880      0t0      TCP 
>> *:https (LISTEN)
>> java    130244 root   64r     FIFO               0,13      0t0 11980884 pipe
>> java    130244 root   65w     FIFO               0,13      0t0 11980884 pipe
>> java    130244 root   66u  a_inode               0,14        0    10970 
>> [eventpoll]
>> java    130244 root   67u     IPv6           11980885      0t0      TCP 
>> *:8009 (LISTEN)
>> java    130244 root   68r     FIFO               0,13      0t0 11980886 pipe
>> java    130244 root   69w     FIFO               0,13      0t0 11980886 pipe
>> java    130244 root   70u  a_inode               0,14        0    10970 
>> [eventpoll]
>> java    130244 root   71w      REG                8,6   342714  1835069 
>> /apps/apache-tomcat/logs/localhost_access_log.2021-05-21.txt
>> java    130244 root   72r     FIFO               0,13      0t0 11968845 pipe
>> java    130244 root   73w     FIFO               0,13      0t0 11968845 pipe
>> java    130244 root   74u  a_inode               0,14        0    10970 
>> [eventpoll]
>> java    130244 root   75r     FIFO               0,13      0t0 11968846 pipe
>> java    130244 root   76w     FIFO               0,13      0t0 11968846 pipe
>> java    130244 root   77u  a_inode               0,14        0    10970 
>> [eventpoll]
>> java    130244 root   78u     sock                0,9      0t0 12154374 
>> protocol: TCPv6
>> java    130244 root   79r     FIFO               0,13      0t0 11968847 pipe
>> java    130244 root   80w     FIFO               0,13      0t0 11968847 pipe
>> java    130244 root   81u  a_inode               0,14        0    10970 
>> [eventpoll]
>> java    130244 root   82r     FIFO               0,13      0t0 11968848 pipe
>> java    130244 root   83w     FIFO               0,13      0t0 11968848 pipe
>> java    130244 root   84u  a_inode               0,14        0    10970 
>> [eventpoll]
>> java    130244 root   86r     FIFO               0,13      0t0 11968849 pipe
>> java    130244 root   87w     FIFO               0,13      0t0 11968849 pipe
>> java    130244 root   88u  a_inode               0,14        0    10970 
>> [eventpoll]
>> java    130244 root   89r     FIFO               0,13      0t0 11968850 pipe
>> java    130244 root   90w     FIFO               0,13      0t0 11968850 pipe
>> java    130244 root   91u  a_inode               0,14        0    10970 
>> [eventpoll]
>> java    130244 root   93u     IPv6           11968853      0t0      TCP 
>> localhost.localdomain:mxi (LISTEN)
>> java    130244 root   94u     IPv6           12298916      0t0      TCP 
>> localhost.localdomain:45734->localhost.localdomain:postgres (ESTABLISHED)
>> java    130244 root   95u     sock                0,9      0t0 12017983 
>> protocol: TCPv6
>> java    130244 root   96u     sock                0,9      0t0 11983086 
>> protocol: TCPv6
>> java    130244 root   97u     sock                0,9      0t0 11983087 
>> protocol: TCPv6
>> java    130244 root   98u     sock                0,9      0t0 11983088 
>> protocol: TCPv6
>> java    130244 root   99u     sock                0,9      0t0 11983089 
>> protocol: TCPv6
>> java    130244 root  100u     sock                0,9      0t0 11983090 
>> protocol: TCPv6
>> java    130244 root  101u     sock                0,9      0t0 11983091 
>> protocol: TCPv6
>> java    130244 root  102u     sock                0,9      0t0 11983092 
>> protocol: TCPv6
>> java    130244 root  103u     sock                0,9      0t0 11969375 
>> protocol: TCPv6
>> java    130244 root  104u     sock                0,9      0t0 11987339 
>> protocol: TCPv6
>> java    130244 root  105u     sock                0,9      0t0 11987347 
>> protocol: TCPv6
>> java    130244 root  106u     sock                0,9      0t0 11969384 
>> protocol: TCPv6
>> java    130244 root  107u     sock                0,9      0t0 11987348 
>> protocol: TCPv6
>> java    130244 root  108r      CHR                1,8      0t0     1041 
>> /dev/random
>> java    130244 root  109w      REG                8,6 19536380  1835053 
>> /apps/apache-tomcat/logs/fms.log
>> java    130244 root  110u     sock                0,9      0t0 11979291 
>> protocol: TCPv6
>> java    130244 root  111u     sock                0,9      0t0 11979292 
>> protocol: TCPv6
>> java    130244 root  112w      REG                8,6   835408  1835019 
>> /apps/apache-tomcat/logs/obd.log
>> java    130244 root  113u     sock                0,9      0t0 11987349 
>> protocol: TCPv6
>> java    130244 root  114u     sock                0,9      0t0 11987350 
>> protocol: TCPv6
>> java    130244 root  115u     sock                0,9      0t0 11987351 
>> protocol: TCPv6
>> java    130244 root  116u     sock                0,9      0t0 11987352 
>> protocol: TCPv6
>> java    130244 root  117u     sock                0,9      0t0 11987353 
>> protocol: TCPv6
>> java    130244 root  118u     sock                0,9      0t0 11987354 
>> protocol: TCPv6
>> java    130244 root  119u     sock                0,9      0t0 11987355 
>> protocol: TCPv6
>> java    130244 root  120u     sock                0,9      0t0 11987356 
>> protocol: TCPv6
>> java    130244 root  121u     sock                0,9      0t0 11987357 
>> protocol: TCPv6
>> java    130244 root  122u     sock                0,9      0t0 11987358 
>> protocol: TCPv6
>> java    130244 root  123u     sock                0,9      0t0 11987359 
>> protocol: TCPv6
>> java    130244 root  124u     sock                0,9      0t0 11987360 
>> protocol: TCPv6
>> ...........................
>> Keep seeing the same line
>>
>> -----Original Message-----
>> From: André Warnier (tomcat/perl) <a...@ice-sa.com>
>> Sent: Saturday, May 22, 2021 10:22 AM
>> To: users@tomcat.apache.org
>> Subject: Re: apache-tomcat-8.5.59 too many open files on Linux 8
>>
>> Mmm. Nothing very special in that netstat output.
>> The sockets seen there look quite normal for tomcat, and there are not a lot.
>> What about the IPv4 sockets ? (remove the -6 in your netstat command)
>>
>> Looks like lsof is counting things which are not IPv6 TCP sockets belonging 
>> to the tomcat JVM process.
>> Where is the difference between the lsof count (19948) and the netstat count 
>> (25) ?
>> (genuine question, I'm puzzled too)
>>
>> Can you give an example of the "lsof -p 130244" output lines ?
>> (not all 19948 please, but enough to see some variety)
>>
>> On 21.05.2021 16:11, Yeggy Javadi wrote:
>>> Hi,
>>> Here its is:
>>> # lsof -p 130244 | grep "protocol: TCPv6"| wc -l
>>> 19948
>>>
>>> # netstat -p -a -6 --tcp | grep 130244
>>> tcp6       0      0 [::]:pcsync-https       [::]:*                  LISTEN  
>>>     130244/java
>>> tcp6       0      0 [::]:https              [::]:*                  LISTEN  
>>>     130244/java
>>> tcp6       0      0 [::]:37537              [::]:*                  LISTEN  
>>>     130244/java
>>> tcp6       0      0 localhost.localdoma:mxi [::]:*                  LISTEN  
>>>     130244/java
>>> tcp6       0      0 [::]:8009               [::]:*                  LISTEN  
>>>     130244/java
>>> tcp6       0      0 [::]:rmiregistry        [::]:*                  LISTEN  
>>>     130244/java
>>> tcp6       0      0 [::]:http               [::]:*                  LISTEN  
>>>     130244/java
>>> tcp6      86      0 Yeggy-F8-FMSVA:39680    172.22.22.192:https     
>>> CLOSE_WAIT  130244/java
>>> tcp6       0      0 Yeggy-F8-FMSVA:54772    Yeggy-F8-FMSVA:vrace    
>>> ESTABLISHED 130244/java
>>> tcp6       0      0 localhost.localdo:42664 localhost.loca:postgres 
>>> ESTABLISHED 130244/java
>>> tcp6       0      0 Yeggy-F8-FMSVA:54782    Yeggy-F8-FMSVA:vrace    
>>> ESTABLISHED 130244/java
>>> tcp6       0      0 Yeggy-F8-FMSVA:54766    Yeggy-F8-FMSVA:vrace    
>>> ESTABLISHED 130244/java
>>> tcp6       0      0 localhost.localdo:42662 localhost.loca:postgres 
>>> ESTABLISHED 130244/java
>>> tcp6       0      0 Yeggy-F8-FMSVA:54778    Yeggy-F8-FMSVA:vrace    
>>> ESTABLISHED 130244/java
>>> tcp6       0      0 localhost.localdo:46966 localhost.localdo:11753 
>>> ESTABLISHED 130244/java
>>> tcp6       0      0 Yeggy-F8-FMSVA:54788    Yeggy-F8-FMSVA:vrace    
>>> ESTABLISHED 130244/java
>>> tcp6       0      0 Yeggy-F8-FMSVA:54770    Yeggy-F8-FMSVA:vrace    
>>> ESTABLISHED 130244/java
>>> tcp6       0      0 Yeggy-F8-FMSVA:http     10.197.255.10:64799     
>>> ESTABLISHED 130244/java
>>> tcp6       0      0 Yeggy-F8-FMSVA:54790    Yeggy-F8-FMSVA:vrace    
>>> ESTABLISHED 130244/java
>>> tcp6       0      0 Yeggy-F8-FMSVA:54776    Yeggy-F8-FMSVA:vrace    
>>> ESTABLISHED 130244/java
>>> tcp6       0      0 Yeggy-F8-FMSVA:54786    Yeggy-F8-FMSVA:vrace    
>>> ESTABLISHED 130244/java
>>> tcp6       0      0 Yeggy-F8-FMSVA:54780    Yeggy-F8-FMSVA:vrace    
>>> ESTABLISHED 130244/java
>>> tcp6       0      0 localhost.localdo:45736 localhost.loca:postgres 
>>> ESTABLISHED 130244/java
>>> tcp6       0      0 Yeggy-F8-FMSVA:54768    Yeggy-F8-FMSVA:vrace    
>>> ESTABLISHED 130244/java
>>> tcp6       0      0 Yeggy-F8-FMSVA:54784    Yeggy-F8-FMSVA:vrace    
>>> ESTABLISHED 130244/java
>>> tcp6       0      0 localhost.localdo:42660 localhost.loca:postgres 
>>> ESTABLISHED 130244/java
>>> tcp6       0      0 Yeggy-F8-FMSVA:54774    Yeggy-F8-FMSVA:vrace    
>>> ESTABLISHED 130244/java
>>> tcp6       0      0 localhost.localdo:45734 localhost.loca:postgres 
>>> ESTABLISHED 130244/java
>>> tcp6       0      0 Yeggy-F8-FMSVA:http     10.197.255.10:64798     
>>> ESTABLISHED 130244/java
>>> tcp6       0      0 localhost.localdo:41016 localhost.localdo:vrace 
>>> ESTABLISHED 130244/java
>>> Thanks
>>> -----Original Message-----
>>> From: Noelette Stout <noelettest...@isu.edu>
>>> Sent: Friday, May 21, 2021 8:28 AM
>>> To: Tomcat Users List <users@tomcat.apache.org>
>>> Subject: Re: apache-tomcat-8.5.59 too many open files on Linux 8
>>>
>>> ss has all the same options as netstat
>>>
>>> On Fri, May 21, 2021 at 3:51 AM André Warnier (tomcat/perl)
>>> <a...@ice-sa.com>
>>> wrote:
>>>
>>>> Soyrry to top-post, but it's getting cluttered down there..
>>>>
>>>> The next thing that you may want to do :
>>>>
>>>>      > netstat -p -a -6 --tcp
>>>>
>>>> That is an alternative list of sockets, which also shows the "tcp state"
>>>> of the sockets.
>>>> To get only the ones of the tomcat JVM PID, filter with grep based of
>>>> the last column.
>>>> The type of thing you are looking for is the column which should show
>>>> "LISTEN", or "ESTABLISHED" or "CLOSE_WAIT" etc..
>>>>
>>>> The options above :
>>>> -p : show PID and program
>>>> -a : show all sockets states
>>>> -6 : only inet v6
>>>> --tcp : only TCP sockets
>>>>
>>>> "netstat" may not be on your system by default, and you may need to
>>>> install it.
>>>> An alternative is "ss", but I don't know the options.
>>>>
>>>>
>>>> On 21.05.2021 02:14, Yeggy Javadi wrote:
>>>>> Hi,
>>>>> Yes; that is what I get and as you can see among 8028 open files,
>>>>> 7474
>>>> are for TCPv6 sockets:
>>>>> java    130244 root 7805u     sock                0,9      0t0 12294251
>>>> protocol: TCPv6
>>>>>
>>>>> # ps -ef | grep tomcat
>>>>> root      130244       1  1 11:01 ?        00:06:20
>>>> /usr/local/jre/bin/java
>>>> -Djava.util.logging.config.file=/usr/local/apache-tomcat/conf/logging.
>>>> properties
>>>> -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
>>>> -d64 -server -Xms1800m -Xmx8192m -XX:MaxMetaspaceSize=1800m
>>>> -Djdk.tls.ephemeralDHKeySize=2048
>>>> -Djava.protocol.handler.pkgs=org.apache.catalina.webresources
>>>> -Dorg.apache.catalina.security.SecurityListener.UMASK=0027
>>>> -Dignore.endorsed.dirs= -classpath
>>>> /usr/local/apache-tomcat/bin/bootstrap.jar:/usr/local/apache-tomcat/b
>>>> i n/tomcat-juli.jar -Dcatalina.base=/usr/local/apache-tomcat
>>>> -Dcatalina.home=/usr/local/apache-tomcat
>>>> -Djava.io.tmpdir=/usr/local/apache-tomcat/temp
>>>> org.apache.catalina.startup.Bootstrap start
>>>>> root      132566  132492  0 20:10 pts/1    00:00:00 grep --color=auto
>>>> tomcat
>>>>>
>>>>> #lsof -p 130244 | wc -l
>>>>> 8028
>>>>>
>>>>> #lsof -p 130244 | grep "protocol: TCPv6"| wc -l
>>>>> 7474
>>>>>
>>>>> Thanks
>>>>>
>>>>> -----Original Message-----
>>>>> From: André Warnier (tomcat/perl) <a...@ice-sa.com>
>>>>> Sent: Thursday, May 20, 2021 4:19 PM
>>>>> To: users@tomcat.apache.org
>>>>> Subject: Re: apache-tomcat-8.5.59 too many open files on Linux 8
>>>>>
>>>>> Hi.
>>>>> According to the list below, you have 2 java (JVM) processes running
>>>>> on
>>>> your system.
>>>>> One (PID = 130244) is the JVM which runs tomcat.  This is visible
>>>>> when
>>>> you look at the whole command-line.
>>>>>
>>>>> The other (PID = 130516) runs ElasticSearch, which I believe is not
>>>> relevant here.
>>>>>
>>>>> So you should run lsof with the "-p 130244" option, to show only the
>>>> files opened by the tomcat JVM.
>>>>> To show the current Tomcat JVM PID, do e.g. : ps -ef | grep
>>>> "apache-tomcat"
>>>>> (or anything else unique in that line)
>>>>>
>>>>>
>>>>> On 20.05.2021 21:00, Yeggy Javadi wrote:
>>>>>> Hi Chris,
>>>>>> Please indicate how to show lsof or netstat to *just the JVM* process.
>>>>>>
>>>>>> Below is the list of running processes on my server:
>>>>>> UID          PID    PPID  C STIME TTY          TIME CMD
>>>>>> root           1       0  0 May07 ?        00:00:14
>>>> /usr/lib/systemd/systemd --switched-root --system --deserialize 17
>>>>>> root           2       0  0 May07 ?        00:00:00 [kthreadd]
>>>>>> root           3       2  0 May07 ?        00:00:00 [rcu_gp]
>>>>>> root           4       2  0 May07 ?        00:00:00 [rcu_par_gp]
>>>>>> root           6       2  0 May07 ?        00:00:00
>>>> [kworker/0:0H-kblockd]
>>>>>> root           8       2  0 May07 ?        00:00:00 [mm_percpu_wq]
>>>>>> root           9       2  0 May07 ?        00:00:00 [ksoftirqd/0]
>>>>>> root          10       2  0 May07 ?        00:02:18 [rcu_sched]
>>>>>> root          11       2  0 May07 ?        00:00:00 [migration/0]
>>>>>> root          12       2  0 May07 ?        00:00:00 [watchdog/0]
>>>>>> root          13       2  0 May07 ?        00:00:00 [cpuhp/0]
>>>>>> root          14       2  0 May07 ?        00:00:00 [cpuhp/1]
>>>>>> root          15       2  0 May07 ?        00:00:00 [watchdog/1]
>>>>>> root          16       2  0 May07 ?        00:00:00 [migration/1]
>>>>>> root          17       2  0 May07 ?        00:00:00 [ksoftirqd/1]
>>>>>> root          19       2  0 May07 ?        00:00:00
>>>> [kworker/1:0H-kblockd]
>>>>>> root          20       2  0 May07 ?        00:00:00 [cpuhp/2]
>>>>>> root          21       2  0 May07 ?        00:00:00 [watchdog/2]
>>>>>> root          22       2  0 May07 ?        00:00:00 [migration/2]
>>>>>> root          23       2  0 May07 ?        00:00:00 [ksoftirqd/2]
>>>>>> root          25       2  0 May07 ?        00:00:00
>>>> [kworker/2:0H-kblockd]
>>>>>> root          26       2  0 May07 ?        00:00:00 [cpuhp/3]
>>>>>> root          27       2  0 May07 ?        00:00:00 [watchdog/3]
>>>>>> root          28       2  0 May07 ?        00:00:00 [migration/3]
>>>>>> root          29       2  0 May07 ?        00:00:00 [ksoftirqd/3]
>>>>>> root          31       2  0 May07 ?        00:00:00
>>>> [kworker/3:0H-kblockd]
>>>>>> root          32       2  0 May07 ?        00:00:00 [cpuhp/4]
>>>>>> root          33       2  0 May07 ?        00:00:00 [watchdog/4]
>>>>>> root          34       2  0 May07 ?        00:00:00 [migration/4]
>>>>>> root          35       2  0 May07 ?        00:00:00 [ksoftirqd/4]
>>>>>> root          37       2  0 May07 ?        00:00:00
>>>> [kworker/4:0H-kblockd]
>>>>>> root          38       2  0 May07 ?        00:00:00 [cpuhp/5]
>>>>>> root          39       2  0 May07 ?        00:00:00 [watchdog/5]
>>>>>> root          40       2  0 May07 ?        00:00:00 [migration/5]
>>>>>> root          41       2  0 May07 ?        00:00:00 [ksoftirqd/5]
>>>>>> root          43       2  0 May07 ?        00:00:00
>>>> [kworker/5:0H-kblockd]
>>>>>> root          44       2  0 May07 ?        00:00:00 [cpuhp/6]
>>>>>> root          45       2  0 May07 ?        00:00:00 [watchdog/6]
>>>>>> root          46       2  0 May07 ?        00:00:00 [migration/6]
>>>>>> root          47       2  0 May07 ?        00:00:00 [ksoftirqd/6]
>>>>>> root          49       2  0 May07 ?        00:00:00
>>>> [kworker/6:0H-kblockd]
>>>>>> root          50       2  0 May07 ?        00:00:00 [cpuhp/7]
>>>>>> root          51       2  0 May07 ?        00:00:00 [watchdog/7]
>>>>>> root          52       2  0 May07 ?        00:00:00 [migration/7]
>>>>>> root          53       2  0 May07 ?        00:00:00 [ksoftirqd/7]
>>>>>> root          55       2  0 May07 ?        00:00:00
>>>> [kworker/7:0H-kblockd]
>>>>>> root          57       2  0 May07 ?        00:00:00 [kdevtmpfs]
>>>>>> root          58       2  0 May07 ?        00:00:00 [netns]
>>>>>> root          59       2  0 May07 ?        00:00:00 [kauditd]
>>>>>> root          62       2  0 May07 ?        00:00:00 [khungtaskd]
>>>>>> root          63       2  0 May07 ?        00:00:00 [oom_reaper]
>>>>>> root          64       2  0 May07 ?        00:00:00 [writeback]
>>>>>> root          65       2  0 May07 ?        00:00:00 [kcompactd0]
>>>>>> root          66       2  0 May07 ?        00:00:00 [ksmd]
>>>>>> root          67       2  0 May07 ?        00:00:02 [khugepaged]
>>>>>> root          68       2  0 May07 ?        00:00:00 [crypto]
>>>>>> root          69       2  0 May07 ?        00:00:00 [kintegrityd]
>>>>>> root          70       2  0 May07 ?        00:00:00 [kblockd]
>>>>>> root          71       2  0 May07 ?        00:00:00 [tpm_dev_wq]
>>>>>> root          72       2  0 May07 ?        00:00:00 [md]
>>>>>> root          73       2  0 May07 ?        00:00:00 [edac-poller]
>>>>>> root          74       2  0 May07 ?        00:00:00 [watchdogd]
>>>>>> root          92       2  0 May07 ?        00:00:00 [kswapd0]
>>>>>> root         188       2  0 May07 ?        00:00:00 [kthrotld]
>>>>>> root         189       2  0 May07 ?        00:00:00 [irq/24-pciehp]
>>>>>> root         190       2  0 May07 ?        00:00:00 [irq/25-pciehp]
>>>>>> root         191       2  0 May07 ?        00:00:00 [irq/26-pciehp]
>>>>>> root         192       2  0 May07 ?        00:00:00 [irq/27-pciehp]
>>>>>> root         193       2  0 May07 ?        00:00:00 [irq/28-pciehp]
>>>>>> root         194       2  0 May07 ?        00:00:00 [irq/29-pciehp]
>>>>>> root         195       2  0 May07 ?        00:00:00 [irq/30-pciehp]
>>>>>> root         196       2  0 May07 ?        00:00:00 [irq/31-pciehp]
>>>>>> root         197       2  0 May07 ?        00:00:00 [irq/32-pciehp]
>>>>>> root         198       2  0 May07 ?        00:00:00 [irq/33-pciehp]
>>>>>> root         199       2  0 May07 ?        00:00:00 [irq/34-pciehp]
>>>>>> root         200       2  0 May07 ?        00:00:00 [irq/35-pciehp]
>>>>>> root         201       2  0 May07 ?        00:00:00 [irq/36-pciehp]
>>>>>> root         202       2  0 May07 ?        00:00:00 [irq/37-pciehp]
>>>>>> root         203       2  0 May07 ?        00:00:00 [irq/38-pciehp]
>>>>>> root         204       2  0 May07 ?        00:00:00 [irq/39-pciehp]
>>>>>> root         205       2  0 May07 ?        00:00:00 [irq/40-pciehp]
>>>>>> root         206       2  0 May07 ?        00:00:00 [irq/41-pciehp]
>>>>>> root         207       2  0 May07 ?        00:00:00 [irq/42-pciehp]
>>>>>> root         208       2  0 May07 ?        00:00:00 [irq/43-pciehp]
>>>>>> root         209       2  0 May07 ?        00:00:00 [irq/44-pciehp]
>>>>>> root         210       2  0 May07 ?        00:00:00 [irq/45-pciehp]
>>>>>> root         211       2  0 May07 ?        00:00:00 [irq/46-pciehp]
>>>>>> root         212       2  0 May07 ?        00:00:00 [irq/47-pciehp]
>>>>>> root         213       2  0 May07 ?        00:00:00 [irq/48-pciehp]
>>>>>> root         214       2  0 May07 ?        00:00:00 [irq/49-pciehp]
>>>>>> root         215       2  0 May07 ?        00:00:00 [irq/50-pciehp]
>>>>>> root         216       2  0 May07 ?        00:00:00 [irq/51-pciehp]
>>>>>> root         217       2  0 May07 ?        00:00:00 [irq/52-pciehp]
>>>>>> root         218       2  0 May07 ?        00:00:00 [irq/53-pciehp]
>>>>>> root         219       2  0 May07 ?        00:00:00 [irq/54-pciehp]
>>>>>> root         220       2  0 May07 ?        00:00:00 [irq/55-pciehp]
>>>>>> root         222       2  0 May07 ?        00:00:00 [acpi_thermal_pm]
>>>>>> root         223       2  0 May07 ?        00:00:00 [kmpath_rdacd]
>>>>>> root         224       2  0 May07 ?        00:00:00 [kaluad]
>>>>>> root         226       2  0 May07 ?        00:00:00 [ipv6_addrconf]
>>>>>> root         227       2  0 May07 ?        00:00:00 [kstrp]
>>>>>> root         508       2  0 May07 ?        00:00:00 [mpt_poll_0]
>>>>>> root         509       2  0 May07 ?        00:00:00 [ata_sff]
>>>>>> root         510       2  0 May07 ?        00:00:00 [mpt/0]
>>>>>> root         512       2  0 May07 ?        00:00:00 [scsi_eh_0]
>>>>>> root         516       2  0 May07 ?        00:00:00 [scsi_tmf_0]
>>>>>> root         517       2  0 May07 ?        00:00:00 [scsi_eh_1]
>>>>>> root         518       2  0 May07 ?        00:00:00 [scsi_tmf_1]
>>>>>> root         524       2  0 May07 ?        00:00:14 [irq/16-vmwgfx]
>>>>>> root         525       2  0 May07 ?        00:00:00 [ttm_swap]
>>>>>> root         531       2  0 May07 ?        00:00:00 [scsi_eh_2]
>>>>>> root         532       2  0 May07 ?        00:00:00 [scsi_tmf_2]
>>>>>> root         540       2  0 May07 ?        00:00:01
>>>> [kworker/7:1H-kblockd]
>>>>>> root         541       2  0 May07 ?        00:00:01
>>>> [kworker/5:1H-kblockd]
>>>>>> root         567       2  0 May07 ?        00:00:07 [jbd2/sda3-8]
>>>>>> root         568       2  0 May07 ?        00:00:00 [ext4-rsv-conver]
>>>>>> root         611       2  0 May07 ?        00:00:49 [jbd2/sda2-8]
>>>>>> root         612       2  0 May07 ?        00:00:00 [ext4-rsv-conver]
>>>>>> root         613       2  0 May07 ?        00:00:01
>>>> [kworker/6:1H-kblockd]
>>>>>> root         650       2  0 May07 ?        00:00:01
>>>> [kworker/4:1H-kblockd]
>>>>>> root         659       2  0 May07 ?        00:00:02
>>>> [kworker/3:1H-kblockd]
>>>>>> root         660       2  0 May07 ?        00:00:02
>>>> [kworker/2:1H-kblockd]
>>>>>> root         662       2  0 May07 ?        00:00:01
>>>> [kworker/0:1H-kblockd]
>>>>>> root         679       1  0 May07 ?        00:00:03
>>>> /usr/lib/systemd/systemd-journald
>>>>>> root         682       2  0 May07 ?        00:00:02
>>>> [kworker/1:1H-kblockd]
>>>>>> root         716       1  0 May07 ?        00:00:01
>>>> /usr/lib/systemd/systemd-udevd
>>>>>> root         723       2  0 May07 ?        00:00:18 [jbd2/sdb1-8]
>>>>>> root         724       2  0 May07 ?        00:00:00 [ext4-rsv-conver]
>>>>>> root         733       2  0 May07 ?        00:00:14 [jbd2/sda6-8]
>>>>>> root         734       2  0 May07 ?        00:00:00 [ext4-rsv-conver]
>>>>>> root         738       2  0 May07 ?        00:00:00 [jbd2/sdc1-8]
>>>>>> root         739       2  0 May07 ?        00:00:00 [ext4-rsv-conver]
>>>>>> root         744       2  0 May07 ?        00:00:00 [jbd2/sda1-8]
>>>>>> root         745       2  0 May07 ?        00:00:00 [ext4-rsv-conver]
>>>>>> root         776       1  0 May07 ?        00:00:01 /sbin/auditd
>>>>>> root         790       2  0 May07 ?        00:00:00 [rpciod]
>>>>>> root         791       2  0 May07 ?        00:00:00 [kworker/u17:0]
>>>>>> root         792       2  0 May07 ?        00:00:00 [xprtiod]
>>>>>> dbus         883       1  0 May07 ?        00:00:03
>>>> /usr/bin/dbus-daemon --system --address=systemd: --nofork --nopidfile
>>>> --systemd-activation --syslog-only
>>>>>> root         885       1  0 May07 ?        00:02:42
>>>> /usr/sbin/NetworkManager --no-daemon
>>>>>> root         887       1  0 May07 ?        00:00:44
>>>> /usr/sbin/irqbalance --foreground
>>>>>> root         888       1  0 May07 ?        00:00:00
>>>> /usr/bin/VGAuthService -s
>>>>>> root         889       1  0 May07 ?        00:10:28 /usr/bin/vmtoolsd
>>>>>> root         890       1  0 May07 ?        00:00:00 /usr/sbin/sssd -i
>>>> --logger=files
>>>>>> chrony       906       1  0 May07 ?        00:00:00 /usr/sbin/chronyd
>>>>>> rngd         944       1  0 May07 ?        00:00:49 /sbin/rngd -f
>>>> --fill-watermark=0
>>>>>> root         946     890  0 May07 ?        00:00:06
>>>> /usr/libexec/sssd/sssd_be --domain implicit_files --uid 0 --gid 0
>>>> --logger=files
>>>>>> root         954       1  0 May07 ?        00:00:00 /usr/sbin/iscsid -f
>>>> -d2
>>>>>> root         962     890  0 May07 ?        00:00:12
>>>> /usr/libexec/sssd/sssd_nss --uid 0 --gid 0 --logger=files
>>>>>> root         963       1  0 May07 ?        00:00:00 /usr/sbin/gssproxy
>>>> -D
>>>>>> root         970       1  0 May07 ?        00:00:02
>>>> /usr/lib/systemd/systemd-logind
>>>>>> root         971       2  0 May07 ?        00:00:00 [iscsi_eh]
>>>>>> root         998       1  0 May07 ?        00:00:33 /usr/sbin/rsyslogd
>>>> -n
>>>>>> root        1007       1  0 May07 ?        00:00:00 /usr/sbin/crond -n
>>>>>> root        6223       1  0 May07 ?        00:07:27
>>>> /usr/local/vtl/bin/sanidmgr
>>>>>> root        6271       2  0 May07 ?        00:00:03 [bksc_exec]
>>>>>> root        6272       2  0 May07 ?        00:00:03 [bksc_done]
>>>>>> root        6274       2  0 May07 ?        00:00:00 [scsi_eh_3]
>>>>>> root        6275       2  0 May07 ?        00:00:00 [scsi_tmf_3]
>>>>>> root        6460       2  0 May07 ?        00:00:00 [kdownstream]
>>>>>> root        6461       2  0 May07 ?        00:00:07 [msgfilter]
>>>>>> root        6463       2  0 May07 ?        00:00:12 [iocore]
>>>>>> root        6466       2  0 May07 ?        00:00:02 [ioctl_mgr]
>>>>>> root        6467       2  0 May07 ?        00:00:02 [ioctl_mgr]
>>>>>> root        6505       1  0 May07 ?        00:00:00 fsnupd -d 0
>>>>>> root        6523       2  0 May07 ?        00:01:50 [trudpd]
>>>>>> root        6539       2  0 May07 ?        00:00:00 [fsnalias_worker]
>>>>>> root        6541       2  0 May07 ?        00:00:00 [fsnalias_check]
>>>>>> root        6551       2  0 May07 ?        00:00:00 [misc_thread]
>>>>>> root        6553       2  0 May07 ?        00:00:01 [mtcp2_listen]
>>>>>> root        6554       2  0 May07 ?        00:00:00 [listen_handle]
>>>>>> root        6557       2  0 May07 ?        00:00:00 [ipstord]
>>>>>> root        6579       2  0 May07 ?        00:00:00 [kfsvshostwq]
>>>>>> root        6580       2  0 May07 ?        00:00:00 [scsi_eh_4]
>>>>>> root        6582       2  0 May07 ?        00:00:00 [scsi_tmf_4]
>>>>>> root        6654       1  0 May07 ?        00:00:00
>>>> /usr/local/vtl/bin/ipstorcomm -d 0
>>>>>> root        6655    6654  0 May07 ?        00:05:18
>>>> /usr/local/vtl/bin/ipstorcomm -d 0
>>>>>> root        6656    6655  0 May07 ?        00:00:36
>>>> /usr/local/vtl/bin/ipstorcomm -d 0
>>>>>> root        6693       1  0 May07 ?        00:00:00 rdesirkey
>>>>>> root        6699       1  0 May07 ?        00:00:12 ikmd
>>>>>> root        6721       1  0 May07 ?        00:00:35
>>>> /usr/local/vtl/bin/iscliproxy
>>>>>> root        6747       1  0 May07 ?        00:00:40
>>>> /usr/local/vtl/bin/ipstorlog
>>>>>> root        6780       1  0 May07 ?        00:04:50
>>>> /usr/local/vtl/bin/snmpd
>>>>>> root        7722       1  0 May07 ?        00:00:00
>>>> /usr/local/vtl/bin/ipstorsm
>>>>>> root        7723    7722  0 May07 ?        01:08:12
>>>> /usr/local/vtl/bin/ipstorsm
>>>>>> root        7901       1  0 May07 ?        00:00:00
>>>> /usr/lib/systemd/systemd --user
>>>>>> root        7904    7901  0 May07 ?        00:00:00 (sd-pam)
>>>>>> root        8179       1  0 May07 tty1     00:00:00 /sbin/agetty -o -p
>>>> -- \u --noclear tty1 linux
>>>>>> root       14199       1  0 May08 ?        00:00:01 sshd: root [priv]
>>>>>> root       14201   14199  0 May08 ?        00:00:01 sshd: root@pts/0
>>>>>> root       14202   14201  0 May08 pts/0    00:00:00 -bash
>>>>>> root       14261       1  0 May08 ?        00:00:00 /usr/sbin/sshd -D
>>>> -oCiphers=aes256-...@openssh.com,chacha20-poly1...@openssh.com
>>>> ,aes256-ctr,aes256-cbc,aes128-...@openssh.com,aes128-ctr,aes128-cbc
>>>> -oMACs=hmac-sha2-256-...@openssh.com,hmac-sha1-...@openssh.com,
>>>> umac-128-...@openssh.com,hmac-sha2-512-...@openssh.com
>>>> ,hmac-sha2-256,hmac-sha1,umac-...@openssh.com,hmac-sha2-512
>>>> -oGSSAPIKexAlgorithms=gss-curve25519-sha256-,gss-nistp256-sha256-,gss
>>>> -
>>>> group14-sha256-,gss-group16-sha512-,gss-gex-sha1-,gss-group14-sha1-
>>>> -oKexAlgorithms=curve25519-sha256,curve25519-sha...@libssh.org,ecdh-s
>>>> h
>>>> a2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-grou
>>>> p
>>>> -exchange-sha256,diffie-hellman-group14-sha256,diffie-hellman-group16
>>>> -
>>>> sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sh
>>>> a
>>>> 1,diffie-hellman-group14-sha1
>>>> -oHostKeyAlgorithms=ecdsa-sha2-nistp256,
>>>> ecdsa-sha2-nistp256-cert-...@openssh.com,ecdsa-sha2-nistp384,
>>>> ecdsa-sha2-nistp384-cert-...@openssh.com,ecdsa-sha2-nistp521,
>>>> ecdsa-sha2-nistp521-cert-...@openssh.com,ssh-ed25519,
>>>> ssh-ed25519-cert-...@openssh.com,rsa-sha2-256,
>>>> rsa-sha2-256-cert-...@openssh.com,rsa-sha2-512,
>>>> rsa-sha2-512-cert-...@openssh.com,ssh-rsa,ssh-rsa-cert-...@openssh.co
>>>> m -oPubkeyAcceptedKeyTypes=ecdsa-sha2-nistp256,
>>>> ecdsa-sha2-nistp256-cert-...@openssh.com,ecdsa-sha2-nistp384,
>>>> ecdsa-sha2-nistp384-cert-...@openssh.com,ecdsa-sha2-nistp521,
>>>> ecdsa-sha2-nistp521-cert-...@openssh.com,ssh-ed25519,
>>>> ssh-ed25519-cert-...@openssh.com,rsa-sha2-256,
>>>> rsa-sha2-256-cert-...@openssh.com,rsa-sha2-512,
>>>> rsa-sha2-512-cert-...@openssh.com,ssh-rsa,ssh-rsa-cert-...@openssh.co
>>>> m
>>>> -oCASignatureAlgorithms=ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa
>>>> - sha2-nistp521,ssh-ed25519,rsa-sha2-256,rsa-sha2-512,ssh-rsa
>>>>>> root      122905       2  0 May19 ?        00:00:27 [kworker/7:0-events]
>>>>>> root      126037       2  0 05:30 ?        00:00:00 [kworker/1:2-events]
>>>>>> root      128108       2  0 08:40 ?        00:00:00
>>>> [kworker/4:1-events_power_efficient]
>>>>>> root      128360       2  0 09:10 ?        00:00:00
>>>> [kworker/4:2-cgroup_destroy]
>>>>>> root      128430       2  0 09:30 ?        00:00:00
>>>> [kworker/6:0-mm_percpu_wq]
>>>>>> root      128738       2  0 11:00 ?        00:00:00
>>>> [kworker/3:3-mm_percpu_wq]
>>>>>> root      128761       2  0 11:00 ?        00:00:00
>>>> [kworker/2:1-mm_percpu_wq]
>>>>>> root      130244       1  1 11:01 ?        00:03:50
>>>> /usr/local/jre/bin/java
>>>> -Djava.util.logging.config.file=/usr/local/apache-tomcat/conf/logging.
>>>> properties
>>>> -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
>>>> -d64 -server -Xms1800m -Xmx8192m -XX:MaxMetaspaceSize=1800m
>>>> -Djdk.tls.ephemeralDHKeySize=2048
>>>> -Djava.protocol.handler.pkgs=org.apache.catalina.webresources
>>>> -Dorg.apache.catalina.security.SecurityListener.UMASK=0027
>>>> -Dignore.endorsed.dirs= -classpath
>>>> /usr/local/apache-tomcat/bin/bootstrap.jar:/usr/local/apache-tomcat/b
>>>> i n/tomcat-juli.jar -Dcatalina.base=/usr/local/apache-tomcat
>>>> -Dcatalina.home=/usr/local/apache-tomcat
>>>> -Djava.io.tmpdir=/usr/local/apache-tomcat/temp
>>>> org.apache.catalina.startup.Bootstrap start
>>>>>> elastic+  130516       1  1 11:01 ?        00:03:26 /bin/java -Xms8g
>>>> -Xmx8g -Djava.awt.headless=true -XX:+UseParNewGC
>>>> -XX:+UseConcMarkSweepGC
>>>> -XX:CMSInitiatingOccupancyFraction=75
>>>> -XX:+UseCMSInitiatingOccupancyOnly
>>>> -XX:+HeapDumpOnOutOfMemoryError -XX:+DisableExplicitGC
>>>> -Dfile.encoding=UTF-8 -Delasticsearch -Des.foreground=yes
>>>> -Des.path.home=/usr/share/elasticsearch -cp
>>>> :/usr/share/elasticsearch/lib/elasticsearch-1.7.6.jar:/usr/share/elas
>>>> t
>>>> icsearch/lib/*:/usr/share/elasticsearch/lib/sigar/*
>>>> -Des.pidfile=/var/run/elasticsearch/elasticsearch.pid
>>>> -Des.default.path.home=/usr/share/elasticsearch
>>>> -Des.default.path.logs=/var/log/elasticsearch
>>>> -Des.default.path.data=/var/lib/elasticsearch
>>>> -Des.default.config=/etc/elasticsearch/elasticsearch.yml
>>>> -Des.default.path.conf=/etc/elasticsearch
>>>> org.elasticsearch.bootstrap.Elasticsearch
>>>>>> postgres  130548       1  0 11:01 ?        00:00:00
>>>> /usr/pgsql-9.6/bin/postgres -D /DB/postgres/data
>>>>>> postgres  130561  130548  0 11:01 ?        00:00:00 postgres: logger
>>>> process
>>>>>> postgres  130563  130548  0 11:01 ?        00:00:00 postgres:
>>>> checkpointer process
>>>>>> postgres  130564  130548  0 11:01 ?        00:00:00 postgres: writer
>>>> process
>>>>>> postgres  130565  130548  0 11:01 ?        00:00:00 postgres: wal
>>>> writer process
>>>>>> postgres  130566  130548  0 11:01 ?        00:00:00 postgres:
>>>> autovacuum launcher process
>>>>>> postgres  130567  130548  0 11:01 ?        00:00:00 postgres: stats
>>>> collector process
>>>>>> root      130570       1  0 11:01 ?        00:00:01
>>>> /usr/local/freestor/bin/fmsd
>>>>>> postgres  130675  130548  0 11:01 ?        00:00:03 postgres: postgres
>>>> freestor 127.0.0.1(42660) idle
>>>>>> postgres  130676  130548  0 11:01 ?        00:00:04 postgres: postgres
>>>> freestor 127.0.0.1(42662) idle
>>>>>> postgres  130677  130548  0 11:01 ?        00:00:03 postgres: postgres
>>>> freestor 127.0.0.1(42664) idle
>>>>>> root      131206       2  0 13:00 ?        00:00:00 [kworker/7:2]
>>>>>> root      131269       2  0 13:20 ?        00:00:00 [kworker/6:2]
>>>>>> root      131347       2  0 13:49 ?        00:00:00
>>>> [kworker/5:1-mm_percpu_wq]
>>>>>> root      131364       2  0 13:56 ?        00:00:00
>>>> [kworker/u16:2-events_unbound]
>>>>>> root      131401       2  0 14:05 ?        00:00:00
>>>> [kworker/u16:1-events_unbound]
>>>>>> root      131438       2  0 14:20 ?        00:00:00 [kworker/2:2]
>>>>>> root      131465       2  0 14:30 ?        00:00:00 [kworker/0:2-events]
>>>>>> root      131490       2  0 14:40 ?        00:00:00 [kworker/3:0]
>>>>>> root      131491       2  0 14:40 ?        00:00:00 [kworker/0:1-events]
>>>>>> root      131515       2  0 14:49 ?        00:00:00
>>>> [kworker/1:0-events_freezable]
>>>>>> root      131520       2  0 14:50 ?        00:00:00 [kworker/5:0]
>>>>>> root      131525   14261  0 14:52 ?        00:00:00 sshd: root [priv]
>>>>>> root      131529  131525  0 14:52 ?        00:00:00 sshd: root@pts/1
>>>>>> root      131530  131529  0 14:52 pts/1    00:00:00 -bash
>>>>>> root      131600  131530  0 14:57 pts/1    00:00:00 ps -ef
>>>>>>
>>>>>> Thanks
>>>>>> -----Original Message-----
>>>>>> From: Christopher Schultz <ch...@christopherschultz.net>
>>>>>> Sent: Thursday, May 20, 2021 12:49 PM
>>>>>> To: users@tomcat.apache.org
>>>>>> Subject: Re: apache-tomcat-8.5.59 too many open files on Linux 8
>>>>>>
>>>>>> Yeggy,
>>>>>>
>>>>>> On 5/19/21 19:37, Yeggy Javadi wrote:
>>>>>>> Hi Chris,
>>>>>>> Thanks for your email. Below are replies to your questions:
>>>>>>>
>>>>>>> 1. Did you upgrade anything recently (like Java VM)?
>>>>>>> [YJ] To support Linux 8, only Postgres was upgraded from version
>>>>>>> 9.3
>>>> to 9.6.
>>>>>>>
>>>>>>> 2. What is error you are seeing? A full stack trace would be helpful.
>>>>>>> [YJ] The application error can occur in any place with the (Too
>>>>>>> many
>>>> open files) error when the limit of open files for tomcat has reached
>>>> (262144 in my environment), for example, I can get a connectivity
>>>> error when pulling info from a server as below :
>>>>>>>
>>>>>>>        [InventoryPullerTask - 10.1.6.25] ERROR
>>>>>>> FSSDataCollectorService - Error : The XML configuration file
>>>>>>> failed to be retrieved for server 10.1.6.25. Check server
>>>>>>> connectivity.Error retrieving IPStorConfg for
>>>>>>> server=10.1.6.25 error=java.io.FileNotFoundException:
>>>>>>> /usr/local/apache-tomcat-8.5.59/webapps/ROOT/WEB-INF/lib/spring-orm-3.
>>>>>>> 2.10.RELEASE.jar (Too many open files) restatus=-1 output=
>>>>>>>
>>>>>>> 3. What is your <Connector> configuration?
>>>>>>> [YJ] It is as below in server.xml:
>>>>>>>
>>>>>>>           <Connector address="0.0.0.0" port="80" protocol="HTTP/1.1"
>>>>>>>                      maxThreads="150"
>>>>>>>                      minSpareThreads="25" maxSpareThreads="75"
>>>>>>>                      enableLookups="false" acceptCount="100"
>>>>>>>                      connectionTimeout="20000" 
>>>>>>> disableUploadTimeout="true"
>>>>>>>                      compression="on"
>>>>>>>                      compressionMinSize="2048"
>>>>>>>                      noCompressionUserAgents="gozilla, traviata"
>>>>>>>
>>>>     compressableMimeType="text/html,text/xml,application/json"
>>>>>>>                      redirectPort="443" /> ...........
>>>>>>>           <Connector address="0.0.0.0" port="443"
>>>> protocol="org.apache.coyote.http11.Http11NioProtocol" SSLEnabled="true"
>>>>>>>                      maxThreads="150" scheme="https" secure="true"
>>>>>>>                      clientAuth="false" sslEnabledProtocols="TLSv1.2"
>>>>>>>
>>>>     
>>>> ciphers="TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA256,TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_256_CBC_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA"
>>>>>>>                      keystoreFile="conf/freestor"
>>>> keystorePass="freestor"/>
>>>>>>>
>>>>>>>           <!-- Define an AJP 1.3 Connector on port 8009 -->
>>>>>>>           <Connector address="0.0.0.0" port="8009" protocol="AJP/1.3"
>>>>>>> redirectPort="443" secretRequired="false" />
>>>>>>
>>>>>> You have lots of settings on the HTTP connector but not the HTTPS one.
>>>>>> Is that intentional? Which one are you using? Or both?
>>>>>>
>>>>>> Are you using AJP? If not, disable the connetor entirely.
>>>>>> Definitely
>>>> never enable it on 0.0.0.0 unless you really know what you are doing.
>>>>>>
>>>>>>> 4. Are you counting all the open files for a single process or all
>>>>>>> of
>>>> the sub-processes which represent the threads of the main process?
>>>>>>> Different kernel versions count things differently.
>>>>>>> [YJ] I am just getting the process ID of tomcat and count open
>>>>>>> files for that process
>>>>>>
>>>>>> Ok.
>>>>>>
>>>>>>> 5. Running lsof, netstat, etc. can you see if some large number of
>>>> those sockets are bound to any specific port (listen or connect)?
>>>>>>> [YJ] Here is the netstat output:
>>>>>>> Active Internet connections (w/o servers)
>>>>>>> Proto Recv-Q Send-Q Local Address           Foreign Address
>>>>     State
>>>>>>> tcp        0      0 Yeggy-F8-FMSVA:ssh      10.12.3.33:55236
>>>> ESTABLISHED
>>>>>>> tcp        0     64 Yeggy-F8-FMSVA:ssh      10.197.255.10:60378
>>>>     ESTABLISHED
>>>>>>> tcp        0      0 localhost.loca:postgres localhost.localdo:36846
>>>> ESTABLISHED
>>>>>>
>>>>>> That's not helpful. I want to see what the JVM process is holding,
>>>>>> not
>>>> what the whole OS is handling.
>>>>>>
>>>>>> My guess is that lsof is going to be a better bet for inspecting
>>>>>> the
>>>> process. But if you get "too many open files" being thrown inside the
>>>> JVM and you don't see a 1/4 million lines of "lsof" output on your
>>>> process, then something else is going on. But remember to limit your
>>>> lsof to *just the JVM* process.
>>>>>>
>>>>>> -chris
>>>>>>
>>>>>>> -----Original Message-----
>>>>>>> From: Christopher Schultz <ch...@christopherschultz.net>
>>>>>>> Sent: Monday, May 17, 2021 5:18 PM
>>>>>>> To: users@tomcat.apache.org
>>>>>>> Subject: Re: apache-tomcat-8.5.59 too many open files on Linux 8
>>>>>>>
>>>>>>> Yeggy,
>>>>>>>
>>>>>>> On 5/17/21 15:17, Yeggy Javadi wrote:
>>>>>>>> Hi,
>>>>>>>> I am seeing too many TCP sockets open by tomcat on Oracle Linux 8:
>>>>>>>> java    51798 root 6601u     sock                0,9      0t0 3959342
>>>> protocol: TCPv6
>>>>>>>>
>>>>>>>> I was running the same application on Linux 7.6 with the same
>>>>>>>> apache-tomcat version without seeing this issue. I saw that
>>>>>>>> RedHat has removed apache-tomcat fom their Linux 8 distribution.
>>>>>>>> Please help with throubleshooting and indicating if there is any
>>>>>>>> changes in Linux
>>>>>>>> 8 that can explain this
>>>>>>>>
>>>>>>>> Configuration:
>>>>>>>> apache-tomcat-8.5.59
>>>>>>>> OEL Linux 8 kernel 4.18.0-193.28.1.el8_2.x86_64 Web-based
>>>>>>>> application using Postgres and elastic search databases
>>>>>>>>
>>>>>>>>
>>>>>>>> # ps -ef | grep tomcat
>>>>>>>> root       51798       1  1 11:16 ?        00:06:01
>>>> /usr/local/jre/bin/java
>>>> -Djava.util.logging.config.file=/usr/local/apache-tomcat/conf/logging.
>>>> properties
>>>> -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
>>>> -d64 -server -Xms1800m -Xmx8192m -XX:MaxMetaspaceSize=1800m
>>>> -Djdk.tls.ephemeralDHKeySize=2048
>>>> -Djava.protocol.handler.pkgs=org.apache.catalina.webresources
>>>> -Dorg.apache.catalina.security.SecurityListener.UMASK=0027
>>>> -Dignore.endorsed.dirs= -classpath
>>>> /usr/local/apache-tomcat/bin/bootstrap.jar:/usr/local/apache-tomcat/b
>>>> i n/tomcat-juli.jar -Dcatalina.base=/usr/local/apache-tomcat
>>>> -Dcatalina.home=/usr/local/apache-tomcat
>>>> -Djava.io.tmpdir=/usr/local/apache-tomcat/temp
>>>> org.apache.catalina.startup.Bootstrap start
>>>>>>>> root       54122   54037  0 19:43 pts/1    00:00:00 grep --color=auto
>>>> tomcat
>>>>>>>>
>>>>>>>>
>>>>>>>> # cat /proc/51798/limits
>>>>>>>> Limit                     Soft Limit           Hard Limit
>>>>     Units
>>>>>>>> Max cpu time              unlimited            unlimited
>>>> seconds
>>>>>>>> Max file size             unlimited            unlimited
>>>> bytes
>>>>>>>> Max data size             unlimited            unlimited
>>>> bytes
>>>>>>>> Max stack size            8388608              unlimited
>>>> bytes
>>>>>>>> Max core file size        unlimited            unlimited
>>>> bytes
>>>>>>>> Max resident set          unlimited            unlimited
>>>> bytes
>>>>>>>> Max processes             256518               256518
>>>>     processes
>>>>>>>> Max open files            262144               262144
>>>>     files
>>>>>>>> Max locked memory         65536                65536
>>>> bytes
>>>>>>>> Max address space         unlimited            unlimited
>>>> bytes
>>>>>>>> Max file locks            unlimited            unlimited
>>>> locks
>>>>>>>> Max pending signals       256518               256518
>>>>     signals
>>>>>>>> Max msgqueue size         819200               819200
>>>>     bytes
>>>>>>>> Max nice priority         0                    0
>>>>>>>> Max realtime priority     0                    0
>>>>>>>> Max realtime timeout      unlimited            unlimited            us
>>>>>>>>
>>>>>>>>
>>>>>>>> Too may open files:
>>>>>>>> # lsof -p 51798 | wc -l
>>>>>>>> 6679
>>>>>>>>
>>>>>>>>
>>>>>>>> Most of open files are TCP sockets:
>>>>>>>> java    51798 root 6601u     sock                0,9      0t0 3959342
>>>> protocol: TCPv6
>>>>>>>>
>>>>>>>>
>>>>>>>> # lsof -p 51798 | grep "protocol: TCPv6" | wc -l
>>>>>>>> 6413
>>>>>>>
>>>>>>> Some potentially dumb questions:
>>>>>>>
>>>>>>> 1. Did you upgrade anything recently (like Java VM)?
>>>>>>>
>>>>>>> 2. What is error you are seeing? A full stack trace would be helpful.
>>>>>>>
>>>>>>> 3. What is your <Connector> configuration?
>>>>>>>
>>>>>>> 4. Are you counting all the open files for a single process or all
>>>>>>> of
>>>> the sub-processes which represent the threads of the main process?
>>>>>>> Different kernel versions count things differently.
>>>>>>>
>>>>>>> 5. Running lsof, netstat, etc. can you see if some large number of
>>>> those sockets are bound to any specific port (listen or connect)?
>>>>>>>
>>>>>>> -chris
>>>>>>>
>>>>
>>>> ---------------------------------------------------------------------
>>>> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
>>>> For additional commands, e-mail: users-h...@tomcat.apache.org
>>>>
>>>
>>>
>>> --
>>> Noelette Stout
>>>
>>> ITS Enterprise Applications - Application Administrator - Senior
>>>
>>> Business Administration Building, Rm 109L
>>> 921 South 8th Ave 8037
>>> Idaho State University
>>> Pocatello ID 83209
>>> E-mail: stounoel "at" isu "dot" edu
>>> Desk: 208-282-2554
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
>>> For additional commands, e-mail: users-h...@tomcat.apache.org
>>>
>>
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
>> For additional commands, e-mail: users-h...@tomcat.apache.org
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
>> For additional commands, e-mail: users-h...@tomcat.apache.org
>>
> 
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
> For additional commands, e-mail: users-h...@tomcat.apache.org
> 
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
> For additional commands, e-mail: users-h...@tomcat.apache.org
> 


---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
For additional commands, e-mail: users-h...@tomcat.apache.org

Reply via email to