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https://issues.apache.org/jira/browse/SOLR-4734?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shalin Shekhar Mangar updated SOLR-4734:
----------------------------------------
Labels: solr-4.3.1-candidate (was: )
I'll backport this to 4.3.1 if there are no objections.
> Leader election fails with an NPE if there is no UpdateLog.
> -----------------------------------------------------------
>
> Key: SOLR-4734
> URL: https://issues.apache.org/jira/browse/SOLR-4734
> Project: Solr
> Issue Type: Bug
> Components: SolrCloud
> Affects Versions: 4.3, 4.2.1
> Environment: Linux 64bit on 3.2.0-33-generic kernel
> Solr: 4.2.1
> ZooKeeper: 3.4.5
> Tomcat 7.0.27
> Reporter: Alexander Eibner
> Assignee: Mark Miller
> Priority: Minor
> Labels: solr-4.3.1-candidate
> Fix For: 5.0, 4.4
>
> Attachments: config-logs.zip
>
>
> The following setup and steps always lead to the same error:
> app01: ZooKeeper
> app02: ZooKeeper, Solr (in Tomcat)
> app03: ZooKeeper, Solr (in Tomcat)
> *) Start ZooKeeper as ensemble on all machines.
> *) Start tomcat on app02/app03
> {code:javascript|title=clusterstate.json}
> null
> cZxid = 0x100000014
> ctime = Thu Apr 18 10:59:24 CEST 2013
> mZxid = 0x100000014
> mtime = Thu Apr 18 10:59:24 CEST 2013
> pZxid = 0x100000014
> cversion = 0
> dataVersion = 0
> aclVersion = 0
> ephemeralOwner = 0x0
> dataLength = 0
> numChildren = 0
> {code}
> *) Upload the configuration (on app02) for the collection via the following
> command:
> {noformat}
> zkcli.sh -cmd upconfig --zkhost app01:4181,app02:4181,app03:4181
> --confdir config/solr/storage/conf/ --confname storage-conf
> {noformat}
> *) Linking the configuration (on app02) via the following command:
> {noformat}
> zkcli.sh -cmd linkconfig --collection storage --confname storage-conf
> --zkhost app01:4181,app02:4181,app03:4181
> {noformat}
> *) Create Collection via:
> {noformat}
> http://app02/solr/admin/collections?action=CREATE&name=storage&numShards=1&replicationFactor=2&collection.configName=storage-conf
> {noformat}
> {code:javascript|title=clusterstate.json}
> {"storage":{
> "shards":{"shard1":{
> "range":"80000000-7fffffff",
> "state":"active",
> "replicas":{
> "app02:9985_solr_storage_shard1_replica2":{
> "shard":"shard1",
> "state":"down",
> "core":"storage_shard1_replica2",
> "collection":"storage",
> "node_name":"app02:9985_solr",
> "base_url":"http://app02:9985/solr"},
> "app03:9985_solr_storage_shard1_replica1":{
> "shard":"shard1",
> "state":"down",
> "core":"storage_shard1_replica1",
> "collection":"storage",
> "node_name":"app03:9985_solr",
> "base_url":"http://app03:9985/solr"}}}},
> "router":"compositeId"}}
> cZxid = 0x100000014
> ctime = Thu Apr 18 10:59:24 CEST 2013
> mZxid = 0x100000047
> mtime = Thu Apr 18 11:04:06 CEST 2013
> pZxid = 0x100000014
> cversion = 0
> dataVersion = 2
> aclVersion = 0
> ephemeralOwner = 0x0
> dataLength = 847
> numChildren = 0
> {code}
> This creates the replication of the shard on app02 and app03, but neither of
> them is marked as leader, both are marked as DOWN.
> And after wards I can not access the collection.
> In the browser I get:
> {noformat}
> "SEVERE: org.apache.solr.common.SolrException: no servers hosting shard:"
> {noformat}
> The following stacktrace in the logs:
> {code}
> Apr 18, 2013 11:04:05 AM org.apache.solr.common.SolrException log
> SEVERE: org.apache.solr.common.SolrException: Error CREATEing SolrCore
> 'storage_shard1_replica2':
> at
> org.apache.solr.handler.admin.CoreAdminHandler.handleCreateAction(CoreAdminHandler.java:483)
> at
> org.apache.solr.handler.admin.CoreAdminHandler.handleRequestBody(CoreAdminHandler.java:140)
> at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)
> at
> org.apache.solr.servlet.SolrDispatchFilter.handleAdminRequest(SolrDispatchFilter.java:591)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:192)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:141)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
> at
> org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:999)
> at
> org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565)
> at
> org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:307)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> at java.lang.Thread.run(Thread.java:722)
> Caused by: org.apache.solr.common.cloud.ZooKeeperException:
> at
> org.apache.solr.core.CoreContainer.registerInZk(CoreContainer.java:931)
> at
> org.apache.solr.core.CoreContainer.registerCore(CoreContainer.java:892)
> at org.apache.solr.core.CoreContainer.register(CoreContainer.java:841)
> at
> org.apache.solr.handler.admin.CoreAdminHandler.handleCreateAction(CoreAdminHandler.java:479)
> ... 19 more
> Caused by: java.lang.NullPointerException
> at
> org.apache.solr.cloud.ShardLeaderElectionContext.runLeaderProcess(ElectionContext.java:190)
> at
> org.apache.solr.cloud.LeaderElector.runIamLeaderProcess(LeaderElector.java:156)
> at
> org.apache.solr.cloud.LeaderElector.checkIfIamLeader(LeaderElector.java:100)
> at
> org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:266)
> at
> org.apache.solr.cloud.ZkController.joinElection(ZkController.java:935)
> at org.apache.solr.cloud.ZkController.register(ZkController.java:761)
> at org.apache.solr.cloud.ZkController.register(ZkController.java:727)
> at
> org.apache.solr.core.CoreContainer.registerInZk(CoreContainer.java:908)
> ... 22 more
> {code}
> I have attached a minimal set of configuration files which are needed to
> replicate this error, also containing the log files for the commands I have
> run in the order above.
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