session Attributes are missing in cluster environment which

anuraggupta Mar 12, 2004 12:55 AM

Hi,

We are facing randomly session attributes are missing in jboss3.2.3 in clustered environment, which is causing Null Pointer exception in our application.

We are using Apache2.0 on windows and JBoss3.2.3 in 2 unix m/c. We are using JK_Mod for clustering.

We also tried sticky session but it is not helping us.
If any one has any idea please help us out.

regards
Anurag

1. Re: session Attributes are missing in cluster environment wh

akirdat Mar 12, 2004 9:05 AM (in response to anuraggupta)

do you have the tag in your web.xml file?
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2. Re: session Attributes are missing in cluster environment wh

akirdat Mar 12, 2004 9:07 AM (in response to anuraggupta)
Let me try this again :

Do you have the tag

<distributable/>

in your web.xml file?
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3. Re: session Attributes are missing in cluster environment wh

oz59 Mar 14, 2004 9:10 PM (in response to anuraggupta)

Greetings.

Also, be sure that objects in the session implement serializable.
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4. Re: session Attributes are missing in cluster environment wh

anuraggupta Mar 14, 2004 11:43 PM (in response to anuraggupta)

Yes, I have tried with [code/]distributable in web.xml also. And all objects are serializable too. After analysis I found that sometimes (random behaviour) most of the missing session variables are of type vector, String [] and String.
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5. Re: session Attributes are missing in cluster environment wh

anuraggupta Mar 15, 2004 7:37 AM (in response to anuraggupta)

We analyze that this problem happens more after restarting of the server and with the time it becomes less.

This problem also happens in non - clustered enviornment.

If 10 Session Attributes are there in session then only few of them are missing not entirely the session object. This problem is not consistent also if you click back link in Browser and submit it again then it will work fine.

If any one has any idea please help us out.

regards
Anurag
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