404 Not Found on action=PREPRECOVERY
------------------------------------
Key: SOLR-3273
URL: https://issues.apache.org/jira/browse/SOLR-3273
Project: Solr
Issue Type: Bug
Components: SolrCloud
Affects Versions: 4.0
Environment: Any
Reporter: Per Steffensen
We have an application based on a recent copy of 4.0-SNAPSHOT. We have a
preformance test setup where we performance test our application (and therefore
indirectly Solr(Cloud)). When we run the performance test against a setup using
SolrCloud without replication, everything seems to run very nicely for days.
When we add replication to the setup the same performance test shows some
problems - which we will report (and maybe help fix) in distinct issues here in
jira.
About the setup - the setup is a little more complex than described below, but
I believe the description will tell "enough":
We have two solr servers which we start from <solr-install>/example using this
command (ZooKeepers have been started before) - we first start solr on server1,
and then starts solr on server2 after solr on server1 finished starting up:
<pre>
nohup java -Xmx4096m -Dcom.sun.management.jmxremote
-DzkHost=server1:2181,server2:2181,server3:2181
-Dbootstrap_confdir=./myapp/conf -Dcollection.configName=myapp_conf
-Dsolr.solr.home=./myapp -Djava.util.logging.config.file=logging.properties
-jar start.jar >./myapp/logs/stdout.log 2>./myapp/logs/stderr.log &
</pre>
The ./myapp/solr.xml looks like this on server1:
<pre>
<?xml version="1.0" encoding="UTF-8" ?>
<solr persistent="false">
<cores adminPath="/admin/myapp" host="server1" hostPort="8983"
hostContext="solr">
<core name="collA_slice1_shard1" instanceDir="."
dataDir="collA_slice1_data" collection="collA" shard="slice1" />
</cores>
</solr>
</pre>
The ./myapp/solr.xml looks like this on server2:
<pre>
<?xml version="1.0" encoding="UTF-8" ?>
<solr persistent="false">
<cores adminPath="/admin/myapp" host="server2" hostPort="8983"
hostContext="solr">
<core name="collA_slice1_shard2" instanceDir="."
dataDir="collA_slice1_data" collection="collA" shard="slice1" />
</cores>
</solr>
</pre>
The first thing we observe is that Solr server1 (running collA_slice1_shard1)
seems to start up nicely, but when Solr server2 (running collA_slice1_shard2)
is started up later it quickly reports the following in its solr.log an keeps
doing that for a long time:
<pre>
SEVERE: Error while trying to recover:org.apache.solr.common.SolrException: Not
Found
request:
http://server1:8983/solr/admin/cores?action=PREPRECOVERY&core=collA_slice1_shard1&nodeName=server2%3A8983_solr&coreNodeName=server2%3A8983_solr_collA_slice1_shard2&state=recovering&checkLive=true&pauseFor=6000&wt=javabin&version=2
at
org.apache.solr.common.SolrExceptionPropagationHelper.decodeFromMsg(SolrExceptionPropagationHelper.java:40)
at
org.apache.solr.client.solrj.impl.CommonsHttpSolrServer.request(CommonsHttpSolrServer.java:445)
at
org.apache.solr.client.solrj.impl.CommonsHttpSolrServer.request(CommonsHttpSolrServer.java:264)
at
org.apache.solr.cloud.RecoveryStrategy.sendPrepRecoveryCmd(RecoveryStrategy.java:188)
at
org.apache.solr.cloud.RecoveryStrategy.doRecovery(RecoveryStrategy.java:285)
at org.apache.solr.cloud.RecoveryStrategy.run(RecoveryStrategy.java:206)
</pre>
Please note that we have changed a little bit in the way errors are logged, but
basically this means that Solr server2 gets an "404 Not Found" on its request
"http://server1:8983/solr/admin/cores?action=PREPRECOVERY&core=collA_slice1_shard1&nodeName=server2%3A8983_solr&coreNodeName=server2%3A8983_solr_collA_slice1_shard2&state=recovering&checkLive=true&pauseFor=6000&wt=javabin&version=2";
to Solr server1.
Seems like there is not a common agreement among the Solr servers on how/where
to send those requests and how/where to listen for them.
Regards, Per Steffensen
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