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https://issues.apache.org/jira/browse/SOLR-10190?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tomás Fernández Löbbe resolved SOLR-10190.
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Resolution: Fixed
Fix Version/s: 6.4.2
master (7.0)
6.5
Resolving. Thanks Janosch!
> Potential NPE in CloudSolrClient when reading stale alias
> ---------------------------------------------------------
>
> Key: SOLR-10190
> URL: https://issues.apache.org/jira/browse/SOLR-10190
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: clients - java, SolrJ
> Affects Versions: 5.5, 6.x, master (7.0)
> Reporter: Janosch Woschitz
> Assignee: Tomás Fernández Löbbe
> Fix For: 6.5, master (7.0), 6.4.2
>
>
> The CloudSolrClient raises a NullPointerException when CloudSolrClient::add
> is invoked and pointed to an alias which references a collection which does
> not exist anymore.
> {code}
> java.lang.NullPointerException
> at __randomizedtesting.SeedInfo.seed([1D00539A964E5C5D:D7D145363AD5CCA]:0)
> at
> org.apache.solr.client.solrj.impl.CloudSolrClient.requestWithRetryOnStaleState(CloudSolrClient.java:1078)
> at
> org.apache.solr.client.solrj.impl.CloudSolrClient.request(CloudSolrClient.java:1042)
> at org.apache.solr.client.solrj.SolrRequest.process(SolrRequest.java:160)
> at org.apache.solr.client.solrj.SolrClient.add(SolrClient.java:106)
> at org.apache.solr.client.solrj.SolrClient.add(SolrClient.java:71)
> at org.apache.solr.client.solrj.SolrClient.add(SolrClient.java:85)
> {code}
> This is a rather unexpected since the CloudSolrClient usually raises a
> SolrException containing a descriptive error message (e.g. "Collection not
> found: xyz") when a collection cannot be resolved.
> In general this error condition could be triggered also by other edge cases
> since CloudSolrClient::getDocCollection might return null but the code
> following that invocation is not guarded against null values.
> {code}
> // track the version of state we're using on the client side using
> the _stateVer_ param
> DocCollection coll = getDocCollection(requestedCollection, null);
> int collVer = coll.getZNodeVersion();
> {code}
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