On Wed, Jan 6, 2021 at 11:58 AM jean-frederic clere <jfcl...@gmail.com>
wrote:
> Hi,
>
> While testing the tomcat clustering I have noted that at the start from
> time to the attribute replication is failing.
> While debugging I have the messages:
> +++
> 05-Jan-2021 10:25:07.046 FINE [Tribes-Task-Receiver[Catalina-Channel]-6]
> org.apache.catalina.ha.session.DeltaManager.handleSESSION_DELTA Manager
> [localhost#/demo-1.0]: received session delta for unknown session
> [596AEB7A68DE2D8F6B9819D4F4F55CDA]
> 05-Jan-2021 10:25:07.045 FINE [Tribes-Task-Receiver[Catalina-Channel]-5]
> org.apache.catalina.ha.session.DeltaManager.messageReceived Manager
> [localhost#/demo-1.0]: Received SessionMessage of
> type=[SESSION-MODIFIED] from
> [org.apache.catalina.tribes.membership.MemberImpl[tcp://{10, 128, 2,
> 182}:4000,{10, 128, 2, 182},4000, alive=10037, securePort=-1, UDP
> Port=-1, id={-87 87 4 -12 89 -46 96 94 12 20 -103 -109 -56 120 -16 74 },
> payload={}, command={}, domain={}]]
> 05-Jan-2021 10:25:07.046 FINE [Tribes-Task-Receiver[Catalina-Channel]-5]
> org.apache.catalina.ha.session.DeltaManager.handleSESSION_CREATED
> Manager [localhost#/demo-1.0]: received session created message for
> session [596AEB7A68DE2D8F6B9819D4F4F55CDA]
>
> +++
> It looks like the delta is processed before the session creation and it
> is ignored.
>
> When using the channelSendOptions="6" I am NOT getting the "received
> session delta for unknown session" and the stuff is working perfectly.
>
> Should we change the default for channelSendOptions to 6? - the actual
> value is 8 -
>
The documentation for the values is here:
http://tomcat.apache.org/tomcat-10.0-doc/config/cluster.html#SimpleTcpCluster_Attributes
So the default is the fastest, but if it's not reliable for many reasonable
use cases it may not be a good idea.
Rémy
>
> --
> Cheers
>
> Jean-Frederic
>
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>
