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Posted to dev@tomcat.apache.org by bu...@apache.org on 2006/11/02 22:37:08 UTC
DO NOT REPLY [Bug 40881] New: - Unable to receive message through TCP channel -> Nullpointer
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Summary: Unable to receive message through TCP channel ->
Nullpointer
Product: Tomcat 5
Version: 5.5.20
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Catalina:Cluster
AssignedTo: tomcat-dev@jakarta.apache.org
ReportedBy: paul.hettl@mindmatics.com
- Message replication failes on the replciated node on creation of
a new session (login via form authentication).
- async cluster configruation is active
- 2 cluster nodes
- statup executed one by one, the second node was added after the first was up fully
- is fully reproducable
Error LOG:
----------------------------------------------------
Unable to receive message through TCP channel
java.lang.NullPointerException
at
org.apache.catalina.cluster.session.DeltaRequest.execute(DeltaRequest.java:176)
at
org.apache.catalina.cluster.session.DeltaManager.handleSESSION_DELTA(DeltaManager.java:1573)
at
org.apache.catalina.cluster.session.DeltaManager.messageReceived(DeltaManager.java:1522)
at
org.apache.catalina.cluster.session.DeltaManager.messageDataReceived(DeltaManager.java:1271)
at
org.apache.catalina.cluster.session.ClusterSessionListener.messageReceived(ClusterSessionListener.java
:85)
at
org.apache.catalina.cluster.tcp.SimpleTcpCluster.receive(SimpleTcpCluster.java:1167)
at
org.apache.catalina.cluster.tcp.ClusterReceiverBase.messageDataReceived(ClusterReceiverBase.java:426)
at
org.apache.catalina.cluster.io.ObjectReader.execute(ObjectReader.java:107)
at
org.apache.catalina.cluster.tcp.TcpReplicationThread.drainChannel(TcpReplicationThread.java:138)
at
org.apache.catalina.cluster.tcp.TcpReplicationThread.run(TcpReplicationThread.java:69)
cluster confirguation:
----------------------------------------------------
<Cluster className="org.apache.catalina.cluster.tcp.SimpleTcpCluster"
doClusterLog="true"
clusterLogName="clusterlog"
useDirtyFlag="true"
expireSessionsOnShutdown="false"
notifyListenersOnReplication="true"
managerClassName="org.apache.catalina.cluster.session.DeltaManager"
>
<Membership
className="org.apache.catalina.cluster.mcast.McastService"
mcastAddr="228.0.0.4"
mcastPort="45552"
mcastFrequency="500"
mcastDropTime="3000"/>
<Receiver
className="org.apache.catalina.cluster.tcp.ReplicationListener"
tcpListenAddress="auto"
tcpListenPort="4001"
tcpSelectorTimeout="100"
tcpThreadCount="6" />
<!--
<Sender
className="org.apache.catalina.cluster.tcp.ReplicationTransmitter"
replicationMode="pooled"
ackTimeout="15000"
waitForAck="false" />
-->
<Sender
className="org.apache.catalina.cluster.tcp.ReplicationTransmitter"
replicationMode="asynchronous"
doProcessingStats="true"
doWaitAckStats="true"
waitForAck="true"
ackTimeout="30000"
resend="true"
keepAliveTimeout="320000"
keepAliveMaxRequestCount="-1" />
<Valve className="org.apache.catalina.cluster.tcp.ReplicationValve"
filter=".*\.gif;.*\.js;.*\.css;.*\.png;.*\.jpeg;.*\.jpg;.*\.htm;.*\.html;.*\.txt;"
primaryIndicator="true" />
<!--
<Deployer
className="org.apache.catalina.cluster.deploy.FarmWarDeployer"
tempDir="${catalina.base}/war-temp"
deployDir="${catalina.base}/war-deploy/"
watchDir="${catalina.base}/war-listen/"
watchEnabled="true"/>
-->
</Cluster>
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DO NOT REPLY [Bug 40881] - Unable to receive message through TCP channel -> Nullpointer
Posted by bu...@apache.org.
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------- Additional Comments From paul.hettl@mindmatics.com 2006-11-03 05:29 -------
Created an attachment (id=19079)
--> (http://issues.apache.org/bugzilla/attachment.cgi?id=19079&action=view)
DeltaRequest (5.5.20)
use java serialisation
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DO NOT REPLY [Bug 40881] - Unable to receive message through TCP channel -> Nullpointer
Posted by bu...@apache.org.
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------- Additional Comments From paul.hettl@mindmatics.com 2006-11-03 05:30 -------
Created an attachment (id=19080)
--> (http://issues.apache.org/bugzilla/attachment.cgi?id=19080&action=view)
added
added util class for java serialisation. old code is still as comment availbale
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DO NOT REPLY [Bug 40881] - Unable to receive message through TCP channel -> Nullpointer
Posted by bu...@apache.org.
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------- Additional Comments From paul.hettl@mindmatics.com 2006-11-04 01:06 -------
(In reply to comment #9)
I use an own realm, simlarf to jdbc realm, that creats a principal that is
serializable and only derived from from java.security.Principal.
As we also use caucho (resin) the have the authentication modules implemented
to be independet from the application server type.
The realm supports a unix crypt password encryption.
I would recomment strongly to make the cluster feature independet from the
GenericPrincipal as it is to string coupled to tomcat this way.
Why don't keep both option or adding a serilaizer factory with a configuration
property in the server.xml to choose the serilaizer class ?
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DO NOT REPLY [Bug 40881] - Unable to receive message through TCP channel -> Nullpointer
Posted by bu...@apache.org.
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------- Additional Comments From paul.hettl@mindmatics.com 2006-11-03 05:32 -------
Created an attachment (id=19082)
--> (http://issues.apache.org/bugzilla/attachment.cgi?id=19082&action=view)
binary of the cluster module sources
- binary of the cluster module sources
- complied Win XP, JDK 1.5.0_05
- including the 4 patches found as sources
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DO NOT REPLY [Bug 40881] - Unable to receive message through TCP channel -> Nullpointer
Posted by bu...@apache.org.
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paul.hettl@mindmatics.com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |NEEDINFO
------- Additional Comments From paul.hettl@mindmatics.com 2006-11-03 05:26 -------
The problem is caused by the interlan implementaion of tomcat's cluster
replciation DeltaSession. The cluster works only with Principal object derived
from the "org.apache.catalina.realm.GenericPrincipal".
I use an one principal implementation, just as implementation of
java.security.Principal. This avoid any conatiner specific dependencies in the
web applications and works around serval problems with the out of the box
principals of tomcat.
To get rid of the bug, i changed the cluster.session code to get rid of the
SerializablePrincipal class. To my readings this class is not very well
designed. The optimised serilaisation can also be places in the implmenetion of
the principal interface ( read/write object) method of java serialisation.
As quick work around, find the changed classes in the attachment:
CHANGED: SimpleTcpReplicationManager
DeltaSession
ADDED: PrincipalIO
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DO NOT REPLY [Bug 40881] - Unable to receive message through TCP channel -> Nullpointer
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
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------- Additional Comments From paul.hettl@mindmatics.com 2006-11-03 05:30 -------
Created an attachment (id=19081)
--> (http://issues.apache.org/bugzilla/attachment.cgi?id=19081&action=view)
SimpleTcpReplicationManager (5.5.20)
use java serilaisation
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DO NOT REPLY [Bug 40881] - Unable to receive message through TCP channel -> Nullpointer
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pr@objektpark.de changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |
------- Additional Comments From pr@objektpark.de 2006-11-03 11:35 -------
Hups, I need info and bug is not closed.
Sorry!
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DO NOT REPLY [Bug 40881] - Unable to receive message through TCP channel -> Nullpointer
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pr@objektpark.de changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEEDINFO |RESOLVED
Resolution| |FIXED
------- Additional Comments From pr@objektpark.de 2006-11-03 11:34 -------
I have deeper looked at your patch. Arrg!
Not every Principal that we used implements the java.io.Serializable. Which realm you used?
Peter
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DO NOT REPLY [Bug 40881] - Unable to receive message through TCP channel -> Nullpointer
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------- Additional Comments From pr@objektpark.de 2006-11-03 11:26 -------
Please produce a really patch and don't send complete patch files.
Then it is easier to help you,
Peter
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------- Additional Comments From paul.hettl@mindmatics.com 2006-11-03 05:28 -------
Created an attachment (id=19078)
--> (http://issues.apache.org/bugzilla/attachment.cgi?id=19078&action=view)
DeltaSession patched (5.5.20)
use plain java serialisation
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