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https://issues.apache.org/jira/browse/SOLR-10092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15880065#comment-15880065
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Hendrik Haddorp commented on SOLR-10092:
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For a setup using a local filesystem I did not see this code to be triggered at
all. But I was just trying to reproduce this on an unpatched installation and
for some reason it looks like it worked now as well. So am going to recheck
again. From what I saw in the code it looked like the code required the shard
id/name to be set, which is also what the exception said, but the
OverseerAutoReplicaFailoverThread is not doing that.
Regarding the instance dir. I'm seeing this in the logs:
2017-02-23 06:43:13.968 INFO (qtp1224347463-12) [c:test.test s:shard1
r:core_node3 x:test.test_shard1_replica1] o.a.s.c.SolrCore
[[test.test_shard1_replica1] ] Opening new SolrCore at
[/var/opt/solr/test.test_shard1_replica1],
dataDir=[hdfs://my-hdfs-namenode:8000/solr/test.test/core_node3/data/]
So even for HDFS there is local information. The folder only contains a
core.properties file. Seems to contain everything required to determine the
replica. Not sure why this is not taken from ZooKeeper though.
> HDFS: AutoAddReplica fails
> --------------------------
>
> Key: SOLR-10092
> URL: https://issues.apache.org/jira/browse/SOLR-10092
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: hdfs
> Affects Versions: 6.3
> Reporter: Hendrik Haddorp
> Attachments: SOLR-10092.patch
>
>
> OverseerAutoReplicaFailoverThread fails to create replacement core with this
> exception:
> o.a.s.c.OverseerAutoReplicaFailoverThread Exception trying to create new
> replica on
> http://...:9000/solr:org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException:
> Error from server at http://...:9000/solr: Error CREATEing SolrCore
> 'test2.collection-09_shard1_replica1': Unable to create core
> [test2.collection-09_shard1_replica1] Caused by: No shard id for
> CoreDescriptor[name=test2.collection-09_shard1_replica1;instanceDir=/var/opt/solr/test2.collection-09_shard1_replica1]
> at
> org.apache.solr.client.solrj.impl.HttpSolrClient.executeMethod(HttpSolrClient.java:593)
> at
> org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.java:262)
> at
> org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.java:251)
> at org.apache.solr.client.solrj.SolrClient.request(SolrClient.java:1219)
> at
> org.apache.solr.cloud.OverseerAutoReplicaFailoverThread.createSolrCore(OverseerAutoReplicaFailoverThread.java:456)
> at
> org.apache.solr.cloud.OverseerAutoReplicaFailoverThread.lambda$addReplica$0(OverseerAutoReplicaFailoverThread.java:251)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:229)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> also see this mail thread about the issue:
> https://lists.apache.org/thread.html/%3CCAA70BoWyzbvQuJTyzaG4Kx1tj0Djgcm+MV=x_hoac1e6cse...@mail.gmail.com%3E
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