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From Ayyanar Inbamohan <technical_ema...@yahoo.com>
Subject website stops answering requests from time to time
Date Wed, 22 Jun 2005 12:45:45 GMT

This is a production site. We use Tomcat 4.1.

website stops answering requests from time to time

Our website is under very high daily volume. Several times a week, no  requests are answered.


Here is the log exception:

java.util.ConcurrentModificationException

at java.util.HashMap$HashIterator.nextEntry(HashMap.java:782)

at java.util.HashMap$EntryIterator.next(HashMap.java:824)

at java.util.HashMap.writeObject(HashMap.java:976)

at sun.reflect.GeneratedMethodAccessor133.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke

(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:324)

at java.io.ObjectStreamClass.invokeWriteObject

(ObjectStreamClass.java:809)

at java.io.ObjectOutputStream.writeSerialData

(ObjectOutputStream.java:1296)

at java.io.ObjectOutputStream.writeOrdinaryObject

(ObjectOutputStream.java:1247)

at java.io.ObjectOutputStream.writeObject0

(ObjectOutputStream.java:1052)

at java.io.ObjectOutputStream.writeObject

(ObjectOutputStream.java:278)

at org.apache.catalina.session.StandardSession.writeObject

(StandardSession.java:1429)

at org.apache.catalina.session.StandardSession.writeObjectData

(StandardSession.java:852)

at org.apache.catalina.session.JDBCStore.save

(JDBCStore.java:690)

at

org.apache.catalina.session.PersistentManagerBase.writeSession

(PersistentManagerBase.java:

739)

at 

org.apache.catalina.session.PersistentManagerBase.processMaxIdleBackups

(PersistentManagerBase.java

:1063)

at 

org.apache.catalina.session.PersistentManagerBase.processPersistenceChecks(PersistentManagerBase.ja

va:477)

at org.apache.catalina.session.PersistentManagerBase.run

(PersistentManagerBase.java:1141)

at java.lang.Thread.run(Thread.java:534)

 

Thanks in Advance,

inr..

 

 


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