-----Original Message----- From: Stanley Bradbury [mailto:[EMAIL PROTECTED] Sent: Tuesday, February 07, 2006 12:00 PM To: [email protected] Subject: Re: Derby - sysinfo call hangs
Mark Kurley wrote: >I was able to narrow it down some more. If I put this call in a loop >it will eventually hang. > >org.apache.derby.drda.NetworkServerControl ping > >Does anyone have any ideas why this would sometimes hang? > >Thanks >-mark > >-----Original Message----- >From: Mark Kurley [mailto:[EMAIL PROTECTED] >Sent: Tuesday, February 07, 2006 11:06 AM >To: [email protected] >Subject: RE: Derby - sysinfo call hangs > > >We are running this on AIX. > >When the process hangs I try to send "kill -QUIT <pid>" to the process >but it just hangs. I get an entry in the file /tmp/javacore_locations. >For example it added the entry > > /tmp/javacore45520.1139323327.txt > >But this core dump file does not exist. The process continues to hang >until I send "kill -9 <pid>". So for some reason it seems like the >process never receives the "kill -QUIT". > >Any suggestions on how I can figure out when the call to the "sysinfo" >script hangs sometimes? > >Thanks >-mark > > >-----Original Message----- >From: Bryan Pendleton [mailto:[EMAIL PROTECTED] >Sent: Thursday, February 02, 2006 5:35 PM >To: [email protected] >Subject: Re: Derby - sysinfo call hangs > > > >>I have noticed that sometimes when I call the "sysinfo" script the >>process hangs. >> >> > >You didn't mention what platform you are running, but you should be >able to get a Java Stack Trace showing all the threads in the sysinfo >process, and what they are waiting on: > >- On Windows, use Control-Break: Hold down the Control key and press > the Break key. > >- On Unix systems, send "kill -QUIT" to the process which is running > sysinfo, from some other window on that machine. > >Then, capture the output from the Java Stack Trace, and send it along. >That will provide more information about where in the sysinfo script it >is hanging. > >thanks, > >bryan > > > > > > It would be very helpful to know what messages are in the derby.log file and to get the information provided by 'NetworkServerControl sysinfo' (when it does execute properly). Once it hangs please try issuing 'NetworkServerControl runtimeinfo' - if this returns there may be useful information - please post that as well. Lastly, when a hang happens is the CPU quiet or very active? Here is more information when I run the "NetworkServerControl ping" command in a loop. The process eventually hangs. The CPU is quiet when the process hangs. 1) Derby.log Connection number: 2506. Connection number: 2507. Connection number: 2508. Connection number: 2509. 2) Output from runtimeinfo when process hangs. --- Cloudscape Network Server Runtime Information --- ---------- Session Information --------------- Session # :2511 ------------------------------------------------------------- # Connection Threads : 3 # Active Sessions : 1 # Waiting Sessions : 0 Total Memory : 5110272 Free Memory : 2476784 3) Here is the sysinfo when it executes properly.... --------- Cloudscape Network Server Information -------- Version: CSS10000/10.0.2.0 Build: 30301 DRDA Product Id: CSS10000 -- listing properties -- derby.drda.host=localhost derby.drda.portNumber=1527 derby.drda.startNetworkServer=false derby.drda.minThreads=1 derby.drda.traceAll=false derby.drda.logConnections=false derby.drda.maxThreads=0 derby.drda.timeSlice=0 ------------------ Java Information ------------------ Java Version: 1.3.1 Java Vendor: IBM Corporation Java home: /usr/java131/jre Java classpath: /usr/local/derby/lib/derby.jar:/usr/local/derby/lib/derbynet.jar:/usr/lo cal/tomcat/webapps/spokeshopcs/WEB-INF/clas ses:/usr/local/tomcat/common/lib/servlet.jar::/usr/java131/jre/jre/lib/r t.jar:/usr/java131/jre:/usr/java131/jre/lib/dt.jar:/usr/java 131/jre/lib/tools.jar:/usr/local/tomcat/webapps/spokeshopcs/WEB-INF/lib/ *.jar://lib/tpcxpackages.jar OS name: AIX OS architecture: ppc OS version: 4.3 Java user name: tomcat Java user home: /home/tomcat Java user dir: /turns/local/tpcx/bin --------- Derby Information -------- [/turns/local/derby/lib/derby.jar] 10.0.2.0 - (30301) [/turns/local/derby/lib/derbynet.jar] 10.0.2.0 - (30301) [/turns/local/tomcat/webapps/spokeshopcs/WEB-INF/classes] 10.0.2.0 - (30301) ------------------------------------------------------ ----------------- Locale Information ----------------- ------------------------------------------------------ Notice: This transmission is for the sole use of the intended recipient(s) and may contain information that is confidential and/or privileged. If you are not the intended recipient, please delete this transmission and any attachments and notify the sender by return email immediately. Any unauthorized review, use, disclosure or distribution is prohibited.
