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https://issues.apache.org/jira/browse/SOLR-8431?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15062081#comment-15062081
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Joel Bernstein commented on SOLR-8431:
--------------------------------------
This is linked to SOLR-8125. I don't this is connected to Streaming or SQL so
I'm going delete the link.
> Parent shard cannot be deleted after shard splitting
> ----------------------------------------------------
>
> Key: SOLR-8431
> URL: https://issues.apache.org/jira/browse/SOLR-8431
> Project: Solr
> Issue Type: Bug
> Affects Versions: 4.10.1
> Reporter: Tan Lay How
> Priority: Blocker
>
> I performed shard splitting on 2 of the shards out of 3 with the async
> request id. The shard splitting task is failed when it trying to attach the
> replica for the splitted shard, but i found out on both of the leader
> splitted shards, document is splitted correctly (total numFound of both
> shards = total numFound of parent shard)
> So, i proceed to manually change the clusterstate.json, splitted shards
> changed status from construction to active, and parent shards changed from
> active to inactive. I also manually attach the replica for the splitted
> shards, then only remove the parent shards by unload the parent shards core.
> Here the problems come, when i issue a commit in SolrCloud, both of the
> parent return back in the solr cloud cloud graph and clusterstate.json with
> node status = down & shard status = active.
> 1) I bring up the parent shards node again and try with another unload core
> again, but every time i issue a commit, it will back into the graph and
> clusterstate with node status = down & shard status = active.
> 2) So my second attempt is to delete the shards with collection API using
> /admin/collections?action=DELETESHARD
> I got the error as below :
> org.apache.solr.client.solrj.impl.HttpSolrServer$RemoteSolrException:Cannot
> >unload non-existent core
> Operation deleteshard caused exception: org.apache.solr.common.SolrException:
> Could not fully remove collection: >candidates shard: candidates_shard2 at
> org.apache.solr.handler.admin.CollectionsHandler.handleResponse(CollectionsHandler.java:364)
> at
> org.apache.solr.handler.admin.CollectionsHandler.handleResponse(CollectionsHandler.java:320)
> at
> org.apache.solr.handler.admin.CollectionsHandler.handleDeleteShardAction(CollectionsHandler.java:563)
> at
> org.apache.solr.handler.admin.CollectionsHandler.handleRequestBody(CollectionsHandler.java:176)
> at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)
> at
> org.apache.solr.servlet.SolrDispatchFilter.handleAdminRequest(SolrDispatchFilter.java:729)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:267)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:207)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
> at
> org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:612)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
> at org.apache.catalina.valves.AutoLoginValve.invoke(AutoLoginValve.java:67)
> at
> org.apache.catalina.valves.RequestFilterValve.process(RequestFilterValve.java:304)
> at
> org.apache.catalina.valves.RemoteAddrValve.invoke(RemoteAddrValve.java:82) at
> org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:683) at
> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
> at
> org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
> at
> org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
> at
> org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at
> org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
> at java.lang.Thread.run(Thread.java:745)
> 3) My third attempt is the delete the replica using the collection API
> admin/collections?action=DELETEREPLICA
> I got the error as below :
> org.apache.solr.common.SolrException:org.apache.solr.common.SolrException:
> Could not remove replica
> org.apache.solr.common.SolrException: Could not remove replica :
> candidates/candidates_shard2/core_node48 at
> org.apache.solr.handler.admin.CollectionsHandler.handleResponse(CollectionsHandler.java:364)
> at
> org.apache.solr.handler.admin.CollectionsHandler.handleResponse(CollectionsHandler.java:320)
> at
> org.apache.solr.handler.admin.CollectionsHandler.handleRemoveReplica(CollectionsHandler.java:495)
> at
> org.apache.solr.handler.admin.CollectionsHandler.handleRequestBody(CollectionsHandler.java:184)
> at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)
> at
> org.apache.solr.servlet.SolrDispatchFilter.handleAdminRequest(SolrDispatchFilter.java:729)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:267)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:207)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
> at
> org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:612)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
> at org.apache.catalina.valves.AutoLoginValve.invoke(AutoLoginValve.java:67)
> at
> org.apache.catalina.valves.RequestFilterValve.process(RequestFilterValve.java:304)
> at
> org.apache.catalina.valves.RemoteAddrValve.invoke(RemoteAddrValve.java:82) at
> org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:683) at
> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
> at
> org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
> at
> org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
> at
> org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at
> org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
> at java.lang.Thread.run(Thread.java:745)
> The parent shards cannot be removed and when the delete query came in, Solr
> will return "No registered leader was found after waiting xx" due to the
> parent shards node status is down but the shards status still appear active
> in the cluster.
> The same goes for select query, will return error "No server hosting shards".
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