Thanks. 2018-03-01 13:18 GMT+02:00 Mark Thomas <ma...@apache.org>: > On 01/03/18 11:10, Industrious wrote: >> Dear All, >> >> In case it is a duplicate I am sorry I had to send this message again > > Please don't do that. > >> because it seems it has not arrived to anybody > > If you haven't received a reply, the most likely reasons are: > - no-one knew the answer; > - the question was poorly written; > - the person that knows the answer hasn't had time to reply yet. > > Re-sending it won't help. > >> and I have not got in my inbox too > > That is a 'feature' of GMail. > >> though it appeared in online archives. > > Which means it arrived. > > Mark > > >> >> I am running Tomcat 8 on Ubuntu. After a few days of running >> successfully my Tomcat's JVM crashes or becomes absolutely >> unresponsive because of OOME errors similar to this in catalina.out: >> --- cut ------- >> SEVERE:Memory usage is low, parachute is non existent, your system may >> start failing. >> java.lang.OutOfMemoryError: Java heap space >> SEVERE:Memory usage is low, parachute is non existent, your system may >> start failing. >> java.lang.OutOfMemoryError: Java heap space >> SEVERE:Memory usage is low, parachute is non existent, your system may >> start failing. >> java.lang.OutOfMemoryError: Java heap space >> SEVERE:Memory usage is low, parachute is non existent, your system may >> start failing. >> java.lang.OutOfMemoryError: Java heap space >> SEVERE:Memory usage is low, parachute is non existent, your system may >> start failing. >> java.lang.OutOfMemoryError: Java heap space >> SEVERE:Memory usage is low, parachute is non existent, your system may >> start failing. >> java.lang.OutOfMemoryError: Java heap space: failed reallocation of >> scalar replaced objects >> >> Exception: java.lang.OutOfMemoryError thrown from the >> UncaughtExceptionHandler in thread "http-nio-80-exec-2" >> --- cut ------- >> >> I was using a VM with 600MB of RAM. Soon I started having problems >> when Linux was killing Tomcat (OOM killer) as it considered its JVM as >> a candidate for killing or if I specify a lower maximum heap size I >> would eventually get OOME from JVM. I moved to a VM with 1.7GB of RAM >> but the problem still occurs eventually though a bit later than on the >> 600MB VM because I somewhat increased the maximum heap size. >> >> It is strange because my webapp used to run fine on Openshift 512MB >> memory VM though it was JRE 1.7 and Tomcat 7. I did not make any >> considerable changes to server.xml (with the exception of those >> necessary to use Tomcat 8) or app itself, I attach my server.xml too. >> >> I have read Tomcat's FAQ, Wiki pages and searched mailing lists but >> nothing seems to fit my case. >> >> I would accept the fact that my application has a memory leak problem >> but it is absolutely unclear from this picture that it has one. >> >> I have tried using Eclipse MAT to analyze memory dumps and to see what >> might be causing this and it turned out that the majority of heap > >> 75% is occupied by RequestInfo instances. I would be really grateful >> if someone could tell me what might be happening there. >> >> Looking forward to your reply. >> >> Best regards, >> Ivan >> >> ============================================================================= >> My current environment: >> VM with 1 CPU which has 1.7GB RAM >> >> Tomcat 8.0.32 (8.0.32-1ubuntu1.5) on Ubuntu 16.04.1. >> >> $ java -version >> openjdk version "1.8.0_151" >> OpenJDK Runtime Environment (build 1.8.0_151-8u151-b12-0ubuntu0.16.04.2-b12) >> OpenJDK 64-Bit Server VM (build 25.151-b12, mixed mode) >> >> $ less /var/lib/tomcat8/bin/setenv.sh >> JAVA_OPTS="-Dlog4j.logging.dir=$CATALINA_BASE/logs \ >> -Dlogging.dir=$CATALINA_BASE/logs \ >> -Djava.awt.headless=true \ >> -Xms220M \ >> -Xmx220M \ >> -Dsun.java2d.cmm=sun.java2d.cmm.kcms.KcmsServiceProvider \ >> -Djava.security.egd=file:/dev/./urandom \ >> -XX:+HeapDumpOnOutOfMemoryError \ >> -XX:HeapDumpPath=$CATALINA_BASE/logs/java_pid%p.hprof" >> >> >> Eclipse MAT report >> ---------------------------------- >> 1,121 instances of "org.apache.coyote.RequestInfo", loaded by >> "java.net.URLClassLoader @ 0xf7202b18" occupy 170,358,720 (77.39%) >> bytes. These instances are referenced from one instance of >> "java.lang.Object[]", loaded by "<system class loader>" - 199MB out of >> 209MB >> >> server.xml >> ---------------------------------- >> <?xml version='1.0' encoding='utf-8'?> >> <Server port="8005" shutdown="SHUTDOWN"> >> <Listener className="org.apache.catalina.startup.VersionLoggerListener" /> >> >> <Listener className="org.apache.catalina.security.SecurityListener" >> minimumUmask="" /> >> <Listener className="org.apache.catalina.core.AprLifecycleListener" >> SSLEngine="on" /> >> <Listener >> className="org.apache.catalina.core.JreMemoryLeakPreventionListener" >> /> >> <Listener >> className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" >> /> >> <Listener >> className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" >> /> >> >> <Service name="Catalina"> >> >> <Executor name="tomcatThreadPool" namePrefix="catalina-exec-" >> maxThreads="20" minSpareThreads="4"/> >> >> <Connector port="80" protocol="HTTP/1.1" >> connectionTimeout="3000" >> redirectPort="443" executor="tomcatThreadPool" /> >> >> <Connector port="443" >> protocol="org.apache.coyote.http11.Http11NioProtocol" >> maxThreads="150" SSLEnabled="true" scheme="https" >> secure="true" >> clientAuth="false" sslProtocol="TLS" >> executor="tomcatThreadPool" >> KeystoreFile="***" KeystorePass="***"/> >> >> <Engine name="Catalina" defaultHost="localhost"> >> >> <Host name="localhost" appBase="webapps" >> unpackWARs="true" autoDeploy="true"> >> >> <Valve className="org.apache.catalina.valves.RemoteIpValve" >> protocolHeader="x-forwarded-proto" ></Valve> >> >> >> <!-- Access log processes all example. >> Documentation at: /docs/config/valve.html >> Note: The pattern used is equivalent to using pattern="common" >> --> >> <Valve className="org.apache.catalina.valves.AccessLogValve" >> directory="logs" >> prefix="localhost_access_log." suffix=".log" >> requestAttributesEnabled="true" >> pattern="combined" /> >> >> </Host> >> </Engine> >> </Service> >> </Server> >> >> --------------------------------------------------------------------- >> 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
