Hi Folks,
LB seems to be unstable when clustered with latest 4.2.0 kernal packs [1].
Though this was first thought of as a PTT issue (see thread@dev -
"java.nio.channels.ClosedChannelException
thrown time to time on ELB console") there seems to be some inconstancy
when nodes are joined to the cluster which we are currently looking into.
When a management node is added to the cluster, only the following log
message is printed in sout.
INFO {org.wso2.carbon.core.clustering.hazelcast.util.MemberUtils} - Added
member: Host:127.0.0.1, Remote Host:null, Port: 3999, HTTP:-1, HTTPS:-1,
Domain: null, Sub-domain:null, Active:true
This was checked with the packs built on 5th and 9th august [2] and as per
discussion with Azeez and Sameera, the products do not get clustered
properly. When management console is accessed, a SOAP Fault pops up on the
browser as
<soapenv:Envelope><soapenv:
Body><nullResponse><Timestamp>Thu Aug 15 2013 16:55:05 GMT+0530
(IST)</Timestamp><Ack>Failure</Ack><Errors><ShortMessage>Gateway
Error</ShortMessage><LongMessage>No application members available
</LongMessage><ErrorCode>500
</ErrorCode><SeverityCode>Error</SeverityCode><ErrorClassification>RequestError</ErrorClassification></Errors><ServiceName>null</ServiceName><ResponseCode>null</ResponseCode><ContentType>null</ContentType><Version>1.5.1</Version></nullResponse></soapenv:Body></soapenv:Envelope>
and with an Exception at the ELB backend
[2013-08-15 16:55:05,407] ERROR - TenantAwareLoadBalanceEndpoint No
application members available
[2013-08-15 16:55:05,909] WARN - SourceHandler Illegal incoming connection
state: REQUEST_DONE . Possibly two send backs are happening for the same
request
[2013-08-15 16:55:05,909] WARN - SourceHandler Trying to write response
body while the handler is in an inconsistent state REQUEST_DONE
[2013-08-15 16:55:05,910] ERROR - TenantAwareLoadBalanceEndpoint No
application members available
[2013-08-15 16:57:28,353] ERROR - TenantAwareLoadBalanceEndpoint No
application members available
[2013-08-15 16:57:28,708] WARN - SourceHandler Illegal incoming connection
state: REQUEST_DONE . Possibly two send backs are happening for the same
request
[2013-08-15 16:57:28,709] WARN - SourceHandler Trying to write response
body while the handler is in an inconsistent state REQUEST_DONE
[2013-08-15 16:57:28,709] ERROR - TenantAwareLoadBalanceEndpoint No
application members available
[2013-08-15 16:57:28,710] ERROR - SourceHandler Unexpected I/O error:
java.nio.channels.ClosedChannelException
java.nio.channels.ClosedChannelException
at
sun.nio.ch.SocketChannelImpl.ensureWriteOpen(SocketChannelImpl.java:135)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:326)
at
org.apache.http.nio.reactor.ssl.SSLIOSession.sendEncryptedData(SSLIOSession.java:331)
at
org.apache.http.nio.reactor.ssl.SSLIOSession.outboundTransport(SSLIOSession.java:411)
at
org.apache.http.impl.nio.reactor.AbstractIODispatch.outputReady(AbstractIODispatch.java:150)
at
org.apache.http.impl.nio.reactor.BaseIOReactor.writable(BaseIOReactor.java:181)
at
org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:346)
at
org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:320)
at
org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:280)
at
org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:106)
at
org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:604)
at java.lang.Thread.run(Thread.java:662)
ELB tries to send a request to the management node but the application
member is not found, hence gets a ClosedChannelException.
[1] https://wso2.org/jira/browse/LB-74
[2]
http://ec2-54-224-94-128.compute-1.amazonaws.com/05-08-2013/<http://www.google.com/url?q=http%3A%2F%2Fec2-54-224-94-128.compute-1.amazonaws.com%2F05-08-2013%2F&sa=D&sntz=1&usg=AFQjCNGFLcc1dySI1P2yUGSGveqEpgXIug>
http://ec2-54-224-94-128.compute-1.amazonaws.com/09-08-2013/
Jeewantha.
--
Jeewantha Dharmaparakrama
Software Engineer; WSO2, Inc.; http://wso2.com/
Phone : (+94) 774726790
Skype : prasad.jeewantha
LinkedIn : http://www.linkedin.com/in/jeewanthad
Twitter: https://twitter.com/jeewamp
Blog: http://jeewanthad.blogspot.com/
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