Solved

Tomcat crashes all of sudden

Posted on 2012-04-06
8
900 Views
Last Modified: 2012-05-23
We are getting out of memory errors for every 2 or 3 days for past 1 or 2 months.

Earlier we never faced this problem. It is working fine for past 3 years.

Only one change we made i.e. https. We configured https few months back.

The error looks like this :

Exception java.lang.OutOfMemoryError: requested 65536000 bytes for GrET* in /BUILD_AREA/jdk1.5.0_22/hotspot/src/share/vm/utilities/growableArray.cpp. Out of swap space?


Os is Centos 5 and 4 GB Ram and tomcat 6.0.20

CATALINA_OPTS="-server -XX:+UseParallelGC -Xmx2348m -Xms2348m -XX:NewSize=1024m -XX:MaxNewSize=1024m -XX:PermSize=128m -XX:MaxPermSize=128m -XX:SurvivorRation:6 *****"

If we increase the ram to 8GB or above will it solves the problem?
0
Comment
Question by:sasidhar1229
8 Comments
 
LVL 12

Accepted Solution

by:
Sharon Seth earned 167 total points
ID: 37817358
There was a bug opened against Sun on this , but this was eventually closed with Sun saying that it could be a third party vendor issue. Suggestions from that bug report:

1. you should establish whether any third-party native code is being used, and if so, use the appropriate tools (such as libumem & mdb on Solaris) to try and pin-point the leak.
2. If no third-party native code is being used, or the leak appears to be coming from the VM/library code then please test using the latest VM update available


http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6327914
0
 
LVL 20

Assisted Solution

by:Sathish David Kumar N
Sathish David  Kumar N earned 167 total points
ID: 37818359
increase JVM size (java_opt) and try ??????
0
 
LVL 26

Expert Comment

by:dpearson
ID: 37818360
Which version of the Java JDK are you using?  "java -version" will show you.

I think CentOS 5 by default only came with a 32-bit JDK 1.4.  If that's the case I'd suggest trying a move up to a 64-bit JDK 1.6 (don't use 1.7 it's a bit too raw still) and push the memory to 8GB.  You can install a second Java alongside the existing one (so easy to rollback if this doesn't help) and then just change where JAVA_HOME points to.

Then check the amount of memory Tomcat is actually using after this and see if it's getting close to the limit or not.

Doug
0
 

Author Comment

by:sasidhar1229
ID: 37818376
Thanks for all your suggestions, I am using java1.5. For upgrading it to 1.6 we have to think of it. And I will try to increase the memory to 8GB. Let's see what happens after that.

Thanks,
Sasidhar.
0
PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

 
LVL 26

Expert Comment

by:dpearson
ID: 37818391
I assume it's 64-bit Java 1.5?  Otherwise you won't get far with trying to raise the memory to 8GB.

Doug
0
 

Author Comment

by:sasidhar1229
ID: 37818407
No it's not. It's 32-bit Java1.5 and CentOS also 32-bit
0
 
LVL 26

Assisted Solution

by:dpearson
dpearson earned 166 total points
ID: 37819666
Normally a 32-bit OS is limited to 4GB of addressable memory, although some OSes added special support to their 32-bit solutions to allow access to more through some special paging tricks.  Not sure if CentOS 5 has that.

In any case 32-bit Java will definitely be limited to 4GB of RAM (a 32-bit pointer can only represent 4 billion unique values).

So you won't be able to move up to 8GB for Java unless you move to a 64-bit architecture.

Doug
0
 
LVL 26

Expert Comment

by:arober11
ID: 37848632
As a stop gap it may be worth scheduling daily bounces of the Tomcat's.
0

Featured Post

Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Securing Jmx Console and web console 2 64
AWS and Java and Rest - newbie question (Is this an authentication issue) 4 68
LINUX CENTOS + APACHE 9 61
varialbe initialization 11 30
Java Flight Recorder and Java Mission Control together create a complete tool chain to continuously collect low level and detailed runtime information enabling after-the-fact incident analysis. Java Flight Recorder is a profiling and event collectio…
Basic understanding on "OO- Object Orientation" is needed for designing a logical solution to solve a problem. Basic OOAD is a prerequisite for a coder to ensure that they follow the basic design of OO. This would help developers to understand the b…
Viewers will learn one way to get user input in Java. Introduce the Scanner object: Declare the variable that stores the user input: An example prompting the user for input: Methods you need to invoke in order to properly get  user input:
Viewers will learn about if statements in Java and their use The if statement: The condition required to create an if statement: Variations of if statements: An example using if statements:

910 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now