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  1. Solr
  2. SOLR-14700

CloudSolrClient cannot be used without setting an explicit streamContext

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: 8.6
    • Fix Version/s: 8.7, master (9.0)
    • Component/s: clients - java
    • Labels:
      None

      Description

      A naive approach to using CloudSolrClient, such as on this page: http://joelsolr.blogspot.com/2015/04/the-streaming-api-solrjio-basics.html - will not work: opening the stream will throw an IOException with an embedded NullPointerException.

      This took me a while to figure out, and I think it would be good to either update the documentation or "fix" the constructor to set the needed streamContext as appropriate.

      I found this snippet of code in TuppleStream.java, that seems to "almost" work without a streamContext:

      // line 127 in the sources to TuppleStream.java:
      public static List<String> getShards(String zkHost,
                                             String collection,
                                             StreamContext streamContext,
                                             SolrParams requestParams)
      ...
      
      // line 135
      if(streamContext != null) {
            shardsMap = (Map<String, List<String>>)streamContext.get("shards");
          }
      ...
      // line 144
      CloudSolrClient cloudSolrClient =
                Optional.ofNullable(streamContext.getSolrClientCache()).orElseGet(SolrClientCache::new).getCloudSolrClient(zkHost);
      
      

      if streamContext is null in the last statement, a NullPointerException will be thrown and open'ening the stream will fail.

      This took me way too long time to figure out.

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              • Assignee:
                Unassigned
                Reporter:
                mabd Mads Bondo Dydensborg
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