Log reader for target <collection> is not initialised

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Log reader for target <collection> is not initialised

Susheel Kumar-3
Hello,

Over the weekend, we restarted nodes on target and source and after that I
see the replication from source to target has stopped and see below warning
messages in solr.log.

What could be done to resolve this.  The leaders on source cluster
shows updateLogSynchronizer
stoppped while replica's on source cluster shows updateLogSynchronizer
started

<response>
<lst name="responseHeader">
<int name="status">0</int>
<int name="QTime">0</int>
</lst>
<lst name="queues">
<lstname="zklist/chroot">
<lst name="COLL">
<long name="queueSize">-1</long>
<str name="lastTimestamp"/>
</lst>
</lst>
</lst>
<long name="tlogTotalSize">393707</long>
<long name="tlogTotalCount">4</long>
<str name="updateLogSynchronizer">stopped</str>
</response>


 WARN
(cdcr-replicator-14-thread-3-processing-n:dc2prsrcvap0059.whc.dc02.us.adp:8080_solr)
[   ] o.a.s.h.CdcrReplicator Log reader for target WFNA is not initialised,
it will be ignored.
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Re: Log reader for target <collection> is not initialised

Susheel Kumar-3
I figured it out that after restarting nodes, source cluster leaders were
switched and causing above warning and cdcr replication to stop. After
stopping the CDCR process and then restart again, above warning disappear
and bootstrap sync stepped in.

On Sun, Apr 15, 2018 at 7:54 PM, Susheel Kumar <[hidden email]>
wrote:

> Hello,
>
> Over the weekend, we restarted nodes on target and source and after that I
> see the replication from source to target has stopped and see below warning
> messages in solr.log.
>
> What could be done to resolve this.  The leaders on source cluster shows updateLogSynchronizer
> stoppped while replica's on source cluster shows updateLogSynchronizer
> started
>
> <response>
> <lst name="responseHeader">
> <int name="status">0</int>
> <int name="QTime">0</int>
> </lst>
> <lst name="queues">
> <lstname="zklist/chroot">
> <lst name="COLL">
> <long name="queueSize">-1</long>
> <str name="lastTimestamp"/>
> </lst>
> </lst>
> </lst>
> <long name="tlogTotalSize">393707</long>
> <long name="tlogTotalCount">4</long>
> <str name="updateLogSynchronizer">stopped</str>
> </response>
>
>
>  WARN  (cdcr-replicator-14-thread-3-processing-n:dc2prsrcvap0059.whc.dc02.us.adp:8080_solr)
> [   ] o.a.s.h.CdcrReplicator Log reader for target WFNA is not initialised,
> it will be ignored.
>
>
>