Hi all, Thanks a lot for valuable points. Here the information you guys asked and the changes I made.
OS : CentOS release 5.4 (Final) httpd-2.2.3-65.el5.centos(front_end) +(mod_jk)+ apache-tomcat-6.0.37 I installed httpd using yum. Downloaded tomcat from Apache as compressed archive(tar.gz) I'm using following startup script. [root@server ~]# cat /etc/init.d/tomcat6 #!/bin/bash # description: Tomcat Start Stop Restart # processname: tomcat # chkconfig: 234 20 80 JAVA_HOME=/usr/java/default export JAVA_HOME PATH=$JAVA_HOME/bin:$PATH export PATH CATALINA_HOME=/usr/share/apache-tomcat-6.0.37 case $1 in start) sh $CATALINA_HOME/bin/startup.sh ;; stop) sh $CATALINA_HOME/bin/shutdown.sh ;; restart) sh $CATALINA_HOME/bin/shutdown.sh sh $CATALINA_HOME/bin/startup.sh ;; esac exit 0 As you said, I removed the JAVA_OPTS declaration from .bash_profile and I have created setenv.sh and set JAVA_OPTS in it. [root@server bin]# pwd /usr/share/apache-tomcat-6.0.37/bin [root@server bin]# cat setenv.sh export JAVA_OPTS='-Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log' Now it shows in grep. [root@server bin]# ps aux | grep Bootstrap root 1100 33.7 5.4 707052 95240 pts/0 Sl 11:29 0:06 /usr/java/default/bin/java -Djava.util.logging.config.file=/usr/share/apache-tomcat-6.0.37/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log -Djava.endorsed.dirs=/usr/share/apache-tomcat-6.0.37/endorsed -classpath /usr/share/apache-tomcat-6.0.37/bin/bootstrap.jar -Dcatalina.base=/usr/share/apache-tomcat-6.0.37 -Dcatalina.home=/usr/share/apache-tomcat-6.0.37 -Djava.io.tmpdir=/usr/share/apache-tomcat-6.0.37/temp org.apache.catalina.startup.Bootstrap start root 1158 0.0 0.0 3932 692 pts/0 R+ 11:29 0:00 grep Bootstrap [root@server bin]# But nothing came in heap.log. So I better monitor this and if I get the OOM again I have to increase Max limit! On Thu, Jan 23, 2014 at 8:50 PM, Christopher Schultz < ch...@christopherschultz.net> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > Randeep, > > On 1/23/14, 7:43 AM, Randeep wrote: > > I'm getting out of memory exception errors. > > :( > > > Exception in thread "Timer-1" java.lang.OutOfMemoryError: Java heap > > space at java.util.Arrays.copyOf(Arrays.java:2882) at > > > java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:100) > > > > > at > > java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:572) > > > > > at java.lang.StringBuffer.append(StringBuffer.java:320) > > at org.json.JSONArray.toString(JSONArray.java:834) at > > org.json.JSONObject.valueToString(JSONObject.java:1359) at > > org.json.JSONObject.toString(JSONObject.java:1233) at > > com.xxx.xxx.servlet.WServlet.writeProgramJson(WServlet.java:503) at > > com.xxx.xxx.servlet.WServlet$1.run(WServlet.java:414) at > > java.util.TimerThread.mainLoop(Timer.java:512) at > > java.util.TimerThread.run(Timer.java:462) > > If you are trying to serialize huge JSON objects, this is going to > happen. I'm not sure if JSON is as smart as the Java Serialization > engine, but if you have a circular-reference in your object graph, I'd > be willing to bet that the JSON serializer will run forever and > exhaust your heap. > > It's also possible that you simply have a tiny heap and need more, > especially if you aren't currently setting any heap parameters. > > > Is there anyway to see currently set jvm heap size details? Any > > linux commands. > > You can attach any profiler to your app. Good luck catching this in > the act, though, in production. > > You can also use "jmap -heap" which comes with the JDK. Just point it > at a process and you'll get a heap summary from a running JVM. Make > sure your JVM and jmap version match. > > > I have tried creating setenv.sh and putting the new parameters in > > it. but echo $JAVA_OPTS was not giving any value. > > setenv.sh is run during Tomcat startup. Running "echo $JAVA_OPTS" from > the command-line isn't going to reveal anything. What you want to do > is modify setenv.sh, re-launch Tomcat, and then look at the process > command line... something like this: > > $ ps aux | grep Bootstrap > > This should give you the whole command-line for Tomcat, and you can > verify that your heap options have been set. > > > So I have put in .bash_profile and run it. Then restarted tomcat6. > > Don't do that: it will only work if you login using bash, and it won't > work for other users you may have to restart Tomcat. > > > this is the line I added in .bash_profile. JAVA_OPTS="-Xms256m > > -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log" > > You'll need to "export" JAVA_OPTS, otherwise it won't do anything for you. > > - -chris > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1 > Comment: GPGTools - http://gpgtools.org > Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ > > iQIcBAEBCAAGBQJS4TM+AAoJEBzwKT+lPKRYfB4QAMP4/MORiK92nK4kJ+KD9alc > 2QYcriasb8QkPPgvYHGhGaxeLIprb1TE6tZdMSp08bHadDr+HpSbxi5xq9C6A1RJ > fabHj9ShrXqdtTFiewPH3P/ulvaaJNPD1LeIFBwoG7/4vAIGKW48gLhaRUYcbe+z > lV2NsZ18u38EZ9KRR8An66jX4PkwMXxl4QdQx5HDmuS/Sx8G7AfDVkuSB5PMNXbg > TVlSEz5VeJnEGtBwnjgIa6ZSTv+iIv+nsw4WVuMe+4h1R07e1axxNismkgpUsU46 > Ra4P7TssgdrqXFXmX4+kPNzd3xbbhPYIOOrQ0PYt6wGF0Wd9N1r/gvvViDbgghca > wp39c3VJM8eE2vy9n0XCGYBkdq2DnRNVFV2y2xnfwecWKtDPEWfklTk8ZvbcAyxe > hi3hxQnChCk74nxd/hvI1uNfgHcd/NwtmifwXPNM0BQCZ+AJarCbGca+a/BTTBaX > txVIuIEf3jt/gpFu28UI8kt7Hx/PgWJ32QFyIPCbH5EYaSiKSz/Q6wCTvJTbUG4s > GCK8AB/rGf1Z8efKlUZw2ESr1yX/VBCu9uOEK/60v+AAthiubq+O2ke1TzWKvy/I > MxDhNiMo710w98h5hqIl5SthwXCgv3vEaaiUgDUV8zP3CoOtHL61NNZmLrMBTD2X > 18aTMDKJ9BTvoYoZcmyV > =IL2E > -----END PGP SIGNATURE----- > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > -- Randeep Mob: +919447831699[kerala] Mob: +919880050349[B'lore] I blog here: http://www.randeeppr.me/ Follow me Here: http://twitter.com/Randeeppr Poke me here! http://www.facebook.com/Randeeppr A little Linux Help http://www.linuxhelp.in/ Work profile: http://in.linkedin.com/in/randeeppr
