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https://issues.apache.org/jira/browse/SOLR-9497?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15481914#comment-15481914
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Will McGinnis commented on SOLR-9497:
-------------------------------------
Exactly what I have done at work and at home. Same results. All the same Solr
6.2. Look at the stack trace. It is coming from Apache HttpClient, not Solr. I
only have one version of Solr on my laptop - Solr 6.2. I store everything else
on an external drive that is not connected, for backup purposes. I have tried
many things in code and consistently get the same basic result. It looks like
to me that the integration with Apache HttpClient may need more exploring.
If I am wrong, please explain a fix and I apologize.
> HttpSolrClient.Builder Returns Unusable Connection
> --------------------------------------------------
>
> Key: SOLR-9497
> URL: https://issues.apache.org/jira/browse/SOLR-9497
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: clients - java
> Affects Versions: 6.2
> Environment: Java 1.8 Mac OSX
> Reporter: Will McGinnis
> Labels: SolrJ
> Fix For: 6.1.1
>
>
> SolrClient solr = new HttpSolrClient.Builder(urlString).build();
> Exception in thread "main" java.lang.VerifyError: Bad return type
> Exception Details:
> Location:
>
> org/apache/solr/client/solrj/impl/HttpClientUtil.createClient(Lorg/apache/solr/common/params/SolrParams;Lorg/apache/http/conn/ClientConnectionManager;)Lorg/apache/http/impl/client/CloseableHttpClient;
> @58: areturn
> Reason:
> Type 'org/apache/http/impl/client/DefaultHttpClient' (current frame,
> stack[0]) is not assignable to
> 'org/apache/http/impl/client/CloseableHttpClient' (from method signature)
> Current Frame:
> bci: @58
> flags: { }
> locals: { 'org/apache/solr/common/params/SolrParams',
> 'org/apache/http/conn/ClientConnectionManager',
> 'org/apache/solr/common/params/ModifiableSolrParams',
> 'org/apache/http/impl/client/DefaultHttpClient' }
> stack: { 'org/apache/http/impl/client/DefaultHttpClient' }
> Bytecode:
> 0x0000000: bb00 0359 2ab7 0004 4db2 0005 b900 0601
> 0x0000010: 0099 001e b200 05bb 0007 59b7 0008 1209
> 0x0000020: b600 0a2c b600 0bb6 000c b900 0d02 002b
> 0x0000030: b800 104e 2d2c b800 0f2d b0
> Stackmap Table:
> append_frame(@47,Object[#143])
> at
> org.apache.solr.client.solrj.impl.HttpSolrClient.<init>(HttpSolrClient.java:209)
> at
> org.apache.solr.client.solrj.impl.HttpSolrClient$Builder.build(HttpSolrClient.java:874)
> I have tried upgrading to httpclient-4.5.2. This appears to create the same
> problem. For now, I use this deprecated, connection code.
> return new HttpSolrClient(urlString, new SystemDefaultHttpClient());
> Eventually, this hangs the Solr server, because you run out of file handles.
> I suspect calling solrClient.close() is doing nothing.
> I tried not closing and using a static connection to Solr.
> This results in basically, the same problem of, eventually hanging the Solr
> server.
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