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Posted to solr-user@lucene.apache.org by Shanmugavel SRD <sr...@gmail.com> on 2011/01/19 13:37:32 UTC
How to find Master & Slave are in sync
How to find Master & Slave are in sync?
Is there a way apart from checking the index version of master and slave
using below two HTTP APIs?
http://master_host:port/solr/replication?command=indexversion
http://slave_host:port/solr/replication?command=details
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Re: How to find Master & Slave are in sync
Posted by Erick Erickson <er...@gmail.com>.
Let's back up a moment and ask why you are doing this from scripts,
because this feels like an XY problem, see:
http://people.apache.org/~hossman/#xyproblem
<http://people.apache.org/~hossman/#xyproblem>
What are you trying to accomplish by swapping cores on the master
and slave?
Solr 1.4 has configuration-based replication, are you using 1.4? This
version of Solr automatically, upon replication, switches to the updated
index.
You can trigger a replication either by configuring the polling interval on
the
slave or by sending the proper HTTP request to the slave. See:
http://wiki.apache.org/solr/SolrReplication#HTTP_API
So, it seems like taking charge of swapping cores may be more work
than you really need to do.
Of course, if you're on a different version of Solr, this is irrelevant.
Best
Erick
On Thu, Jan 27, 2011 at 8:38 AM, Shanmugavel SRD
<sr...@gmail.com>wrote:
>
> Markus,
> The problem here is if I call the below two URLs immediately after
> replication then I am getting both the index versions as same. In my python
> script I have added code to swap the online core on master with offline
> core
> on master and online core on slave with offline core on slave, if both the
> versions are same. After calling swap, I am getting error in slave's log
> like below.
> So I am confused why this is happening. Can you please help me on this?
>
> > http://master_host:port/solr/replication?command=indexversion
> > http://slave_host:port/solr/replication?command=details
>
>
> 2011-01-27 07:45:26,713 WARN [org.apache.solr.handler.SnapPuller]
> (Thread-59) No content recieved for file: {size=154098810, name=_e3.cfx,
> lastmodified=1296132092000}
> 2011-01-27 07:45:27,396 ERROR [org.apache.solr.handler.ReplicationHandler]
> (Thread-59) SnapPull failed
>
> org.apache.solr.common.SolrException: Unable to download _e3.cfx
> completely. Downloaded 0!=154098810
> at
>
> org.apache.solr.handler.SnapPuller$FileFetcher.cleanup(SnapPuller.java:1026)
> at
>
> org.apache.solr.handler.SnapPuller$FileFetcher.fetchFile(SnapPuller.java:906)
> at
> org.apache.solr.handler.SnapPuller.downloadIndexFiles(SnapPuller.java:541)
> at
> org.apache.solr.handler.SnapPuller.fetchLatestIndex(SnapPuller.java:294)
>
> --
> View this message in context:
> http://lucene.472066.n3.nabble.com/How-to-find-Master-Slave-are-in-sync-tp2287014p2362679.html
> Sent from the Solr - User mailing list archive at Nabble.com.
>
Re: How to find Master & Slave are in sync
Posted by Shanmugavel SRD <sr...@gmail.com>.
Markus,
The problem here is if I call the below two URLs immediately after
replication then I am getting both the index versions as same. In my python
script I have added code to swap the online core on master with offline core
on master and online core on slave with offline core on slave, if both the
versions are same. After calling swap, I am getting error in slave's log
like below.
So I am confused why this is happening. Can you please help me on this?
> http://master_host:port/solr/replication?command=indexversion
> http://slave_host:port/solr/replication?command=details
2011-01-27 07:45:26,713 WARN [org.apache.solr.handler.SnapPuller]
(Thread-59) No content recieved for file: {size=154098810, name=_e3.cfx,
lastmodified=1296132092000}
2011-01-27 07:45:27,396 ERROR [org.apache.solr.handler.ReplicationHandler]
(Thread-59) SnapPull failed
org.apache.solr.common.SolrException: Unable to download _e3.cfx
completely. Downloaded 0!=154098810
at
org.apache.solr.handler.SnapPuller$FileFetcher.cleanup(SnapPuller.java:1026)
at
org.apache.solr.handler.SnapPuller$FileFetcher.fetchFile(SnapPuller.java:906)
at
org.apache.solr.handler.SnapPuller.downloadIndexFiles(SnapPuller.java:541)
at
org.apache.solr.handler.SnapPuller.fetchLatestIndex(SnapPuller.java:294)
--
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Re: How to find Master & Slave are in sync
Posted by Markus Jelsma <ma...@openindex.io>.
Notice the index version number? If it's equal, then they are in sync.
On Wednesday 19 January 2011 13:37:32 Shanmugavel SRD wrote:
> How to find Master & Slave are in sync?
> Is there a way apart from checking the index version of master and slave
> using below two HTTP APIs?
>
> http://master_host:port/solr/replication?command=indexversion
> http://slave_host:port/solr/replication?command=details
--
Markus Jelsma - CTO - Openindex
http://www.linkedin.com/in/markus17
050-8536620 / 06-50258350