Java is generating more heap dumps

[Former Member]

Hi Gurus,

Java system generating more dumps and file is filling completely. i saw some of the notes and threads but still not able to find problem and solution.

please help me to solve this issue.

under usr/sap/sid/instance/j2ee/cluster we have dumps folder is having around 76 gb and another folder apps is also having around 20 gb.

please help me clear this issue.

please find error screenshots.

Thanks in advance.

Venkat

[Former Member · Accepted solution]

Hi Venkat,

What system in your IX4 - BI/ECC ?

If you want to find the root cause you have to use any of the Heap Dump analyzer tools. You can also use Solution Manager.

As a workaround you can increase the server nodes.

Can you check the Garbage Collection history ?

Thanks,

Samik

[Former Member · Accepted solution]

Hello Venkat

As recommended by Samik above you should definitely analyze the heap dumps using a memory analyzer.

If you are still experiencing heap dumps then probably your heap size is too low. Have you tried to increase it ? what is it currently set at ?

Regards

Amit Padmawar

[Former Member · Accepted solution]

Hi All,

still am not able to solve this dump issue, please help me to solve this.

here am attaching some error screens of logs, due to lomitations am not able to attach complete logs.

Thanks in advance,

Venkat

[Former Member · Accepted solution]

Hello Vankat,

This Out Of Memory issue is very common in SAP Java stack. I see your Java Heap memory is configured at 2048MB. As suggested above you an increase this to 3 GB as an interim solution (Please refer corresponding SAP Note for your operating system and JVM version to adjust other related parameters)

Also, how many server nodes do you have in your application server? And what type of system is this ? Did you try increasing server nodes ?

Regards,

Samik

[Former Member · Accepted solution]

Hi Samik,

It is BI system and only one server node is configured on this.

my OS is windows 2003 x64 bit and db is oracle 10g

JVM version is sap jvm5

Thanks in advance.

Venkat

[Asha_Pillai · Accepted solution]

Hello Venkat,

If you are using BI system, please increase the heap. The following note will be helpful

1044330  Java parameterization for BI systems

Regards,

Asha

[Former Member · Accepted solution]

Hi Asha,

i have increased heap memory to 3 gb but no use.

when i go and check NWA logs i observers there are some SLD error coming first then it is showing OOM error.

not sure will it related to OOM ?

Thanks in advance,

Venkat

[Former Member · Accepted solution]

Hello Raja,

Please gothrough  SAP note 1634068 - .hprof files are hugely generated.

Regards,

Vishal

[Former Member · Accepted solution]

Hi Venkat,

Can you try analyzing the Heap Dumps to identify which application consuming all the memory ? You can use Eclipse Memory Analyzer. Check this link-

https://wiki.sdn.sap.com/wiki/display/Java/Java%20Memory%20Analysis

BI system Java application memory footprint can be higher, so you can think of increasing server nodes as a tuning measure if the dumps are appearing frequently.

Regards,

Samik

[Former Member · Accepted solution]

Hi All,

Finally am able to close this issue.

Actually issue is with SLD and it got resolved by applying latest patches for components J2EE ENGINE LM-CORE 7.11 and J2EE ENGINE FRAMEWORK

Check this note 1500151 - Out-of-memory error during system registration in SLD

Thanks to all for your time.

Venkat