RE: Getting out of memory using tomcat 6.0.20 but works fine in tomcat 5.5.28
Thank you for all your suggestions. I did not wait till getting out of memory. I analyzed heap dumps continuous and find keeps on increasing the objects and also taking more memory so I stopped after half an hour. I want to know why StandardSessions are increasing. It is not happening in tomcat 5.5.28. See the attached image for the finding out what taking more memory. http://www.nabble.com/file/p25883072/Tomcat6.0.20-heap-analysis.png Thanks, Kalpana Caldarale, Charles R wrote: > >> From: Curtis Garman [mailto:curt.gar...@gmail.com] >> Subject: Re: Getting out of memory using tomcat 6.0.20 but works fine >> in tomcat 5.5.28 >> >> I believe the default amount of PermGenSpace in tomcat was reduced >> between 5 and 6... > > You believe incorrectly. Tomcat itself cannot affect the JVM heap > settings, since they're already established by the time any Tomcat logic > gets control. It is possible for the startup scripts to set heap size > values, but the ones distributed with Tomcat do not. It is theoretically > possible that Tomcat 6.0 requires a larger PermGen than 5.5 did, but I > have seen no evidence to support that (there is some evidence that the > opposite is true). > > Without more information about what portion of the heap is exhausted, this > is all speculation. Since an OOME is also thrown for a variety of > non-heap issues, this may not even be heap related. > > - Chuck > > > THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY > MATERIAL and is thus for use only by the intended recipient. If you > received this in error, please contact the sender and delete the e-mail > and its attachments from all computers. > > > > - > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > > -- View this message in context: http://www.nabble.com/Getting-out-of-memory-using-tomcat-6.0.20-but-works-fine-in-tomcat-5.5.28-tp25866219p25883072.html Sent from the Tomcat - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Getting out of memory using tomcat 6.0.20 but works fine in tomcat 5.5.28
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Kalpana, On 10/12/2009 10:22 PM, kalpanab wrote: > My application working fine in tomcat 5.5.28 and java version "1.5.0_19" > while doing load balancing tests. But when I upgrade tomcat to version > 6.0.20 getting out of memory soon. I looked at the heap dump using Eclipse > memory analyzer below listed taking more memory. > > java.util.concurrent.ConcurrentHashMap$Segment 44.73 % (3,353 objects) What does that 44.73% mean? Since you have a profiler handy, can you see what objects are hanging onto the ConcurrentHashMap objects that "own" those Segment objects? I have seen several reports from Tomcat users here on the list that Tomcat 6.0 appears to take more memory than Tomcat 5.5, so it's possible that you will need to increase your heap size in order to feed the later version. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.9 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkrU++8ACgkQ9CaO5/Lv0PDDJACdHEwUx5etsFEbB0E9aS/sHaki 0lsAn11sOUOM36TOgX9BSClPpfvsIPm6 =P5CE -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
RE: Getting out of memory using tomcat 6.0.20 but works fine in tomcat 5.5.28
> From: Curtis Garman [mailto:curt.gar...@gmail.com] > Subject: Re: Getting out of memory using tomcat 6.0.20 but works fine > in tomcat 5.5.28 > > I believe the default amount of PermGenSpace in tomcat was reduced > between 5 and 6... You believe incorrectly. Tomcat itself cannot affect the JVM heap settings, since they're already established by the time any Tomcat logic gets control. It is possible for the startup scripts to set heap size values, but the ones distributed with Tomcat do not. It is theoretically possible that Tomcat 6.0 requires a larger PermGen than 5.5 did, but I have seen no evidence to support that (there is some evidence that the opposite is true). Without more information about what portion of the heap is exhausted, this is all speculation. Since an OOME is also thrown for a variety of non-heap issues, this may not even be heap related. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Getting out of memory using tomcat 6.0.20 but works fine in tomcat 5.5.28
What do your logs say? Is it a "out of perm gen space" error? I believe the default amount of PermGenSpace in tomcat was reduced between 5 and 6...so you may need to increase it. On Mon, Oct 12, 2009 at 9:22 PM, kalpanab wrote: > > Hi All, > > My application working fine in tomcat 5.5.28 and java version "1.5.0_19" > while doing load balancing tests. But when I upgrade tomcat to version > 6.0.20 getting out of memory soon. I looked at the heap dump using Eclipse > memory analyzer below listed taking more memory. > > java.util.concurrent.ConcurrentHashMap$Segment 44.73 % (3,353 objects) > > ConcurrentHashMap$Segment contains the objects of > java.util.concurrent.locks.ReentrantLock$NonfairSync and > java.util.concurrent.ConcurrentHashMap$HashEnry[]. > > I am using 64 bin sun os (5.10 Generic_120012-14 i86pc i386 i86pc). > > Any bug in tomcat 6.0.20 version? > > Thanks, > Kalpana > > > -- > View this message in context: > http://www.nabble.com/Getting-out-of-memory-using-tomcat-6.0.20-but-works-fine-in-tomcat-5.5.28-tp25866219p25866219.html > Sent from the Tomcat - User mailing list archive at Nabble.com. > > > - > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > -- Curtis Garman Web Programmer Heartland Community College - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Getting out of memory using tomcat 6.0.20 but works fine in tomcat 5.5.28
Hi All, My application working fine in tomcat 5.5.28 and java version "1.5.0_19" while doing load balancing tests. But when I upgrade tomcat to version 6.0.20 getting out of memory soon. I looked at the heap dump using Eclipse memory analyzer below listed taking more memory. java.util.concurrent.ConcurrentHashMap$Segment 44.73 % (3,353 objects) ConcurrentHashMap$Segment contains the objects of java.util.concurrent.locks.ReentrantLock$NonfairSync and java.util.concurrent.ConcurrentHashMap$HashEnry[]. I am using 64 bin sun os (5.10 Generic_120012-14 i86pc i386 i86pc). Any bug in tomcat 6.0.20 version? Thanks, Kalpana -- View this message in context: http://www.nabble.com/Getting-out-of-memory-using-tomcat-6.0.20-but-works-fine-in-tomcat-5.5.28-tp25866219p25866219.html Sent from the Tomcat - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
