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https://issues.apache.org/jira/browse/SOLR-13471?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16840135#comment-16840135
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Noble Paul commented on SOLR-13471:
-----------------------------------
Looking at the stacktrace , it looks like the top-level object (an
SimpleOrderedMap) has a Boolean as key (instead of String). and I think the
call is {{fetchIndex}} .I couldn't see a place where a boolean key is added
> javabin codec can marshal data that it can't unmarshal (ClassCastException:
> class java.lang.Boolean cannot be cast to class java.lang.String)
> ---------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-13471
> URL: https://issues.apache.org/jira/browse/SOLR-13471
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Hoss Man
> Priority: Major
>
> I haven't dug into this, or been able to reproduce it (let alone get any
> additional logging/debugging/breakpoint info) but in a few very sporadic,
> very rare, instances of running TestReplicationHandlerDiskOverFlow, I
> triggered ClassCastException's in JavaBinCodec unmarshal code -- indicating
> that there is some disconnect in expectations between the marshal & unmarshal
> code paths...
> {noformat}
> [junit4] 2> 13342 ERROR (Thread-19) [ ]
> o.a.s.h.TestReplicationHandlerDiskOverFlow Query Thread Failure
> [junit4] 2> =>
> org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException: Error
> from server at http://127.0.0.1:54505/solr/collection1: class
> java.lang.Boolean cannot be cast to class java.lang.String (java.lang.Boolean
> and java.lang.String are in module java.base of loader 'bootstrap')
> [junit4] 2> at
> org.apache.solr.client.solrj.impl.HttpSolrClient.executeMethod(HttpSolrClient.java:622)
> [junit4] 2>
> org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException: Error
> from server at http://127.0.0.1:54505/solr/collection1: class
> java.lang.Boolean cannot be cast to class java.lang.String (java.lang.Boolean
> and java.lang.String are in module java.base of loader 'bootstrap')
> [junit4] 2> at
> org.apache.solr.client.solrj.impl.HttpSolrClient.executeMethod(HttpSolrClient.java:622)
> ~[java/:?]
> [junit4] 2> at
> org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.java:255)
> ~[java/:?]
> [junit4] 2> at
> org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.java:244)
> ~[java/:?]
> [junit4] 2> at
> org.apache.solr.client.solrj.SolrRequest.process(SolrRequest.java:207)
> ~[java/:?]
> [junit4] 2> at
> org.apache.solr.client.solrj.SolrClient.query(SolrClient.java:987) ~[java/:?]
> [junit4] 2> at
> org.apache.solr.client.solrj.SolrClient.query(SolrClient.java:1002) ~[java/:?]
> [junit4] 2> at
> org.apache.solr.handler.TestReplicationHandlerDiskOverFlow.lambda$testDiskOverFlow$1(TestReplicationHandlerDiskOverFlow.java:154)
> ~[test/:?]
> [junit4] 2> at java.lang.Thread.run(Thread.java:834) [?:?]
> [junit4] 2> Caused by: java.lang.ClassCastException: class
> java.lang.Boolean cannot be cast to class java.lang.String (java.lang.Boolean
> and java.lang.String are in module java.base of loader 'bootstrap')
> [junit4] 2> at
> org.apache.solr.common.util.JavaBinCodec.readOrderedMap(JavaBinCodec.java:223)
> ~[java/:?]
> [junit4] 2> at
> org.apache.solr.common.util.JavaBinCodec.readObject(JavaBinCodec.java:298)
> ~[java/:?]
> [junit4] 2> at
> org.apache.solr.common.util.JavaBinCodec.readVal(JavaBinCodec.java:280)
> ~[java/:?]
> [junit4] 2> at
> org.apache.solr.common.util.JavaBinCodec.unmarshal(JavaBinCodec.java:193)
> ~[java/:?]
> [junit4] 2> at
> org.apache.solr.client.solrj.impl.BinaryResponseParser.processResponse(BinaryResponseParser.java:50)
> ~[java/:?]
> [junit4] 2> at
> org.apache.solr.client.solrj.impl.HttpSolrClient.executeMethod(HttpSolrClient.java:620)
> ~[java/:?]
> [junit4] 2> ... 7 more
>
> {noformat}
> It's possible that something about the test code (or code being tested) is
> doing something it should not be doing, and adding something "unexpeted" to
> the response object -- but either the unmarshal code needs to be _as
> forgiving_ as marshal code, or the marshal code should fail fast -- not
> produce a binary stream that the unmarshal code can't parse.
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