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  1. Solr
  2. SOLR-14456

Compressed requests fail in SolrCloud when the request is routed internally by the serving solr node



    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • 7.7.2
    • 8.6, main (9.0)
    • SolrCloud
    • None


      Solr cluster setup

      • Solr version: 7.7.2
      • Solr cloud enabled
      • Cluster topology: 6 nodes, 1 single collection, 10 shards and 3 replicas. 1 HTTP LB using Round Robin over all nodes
      • All cluster nodes have gzip enabled for all paths, all HTTP verbs and all MIME types.
      • Solr client: HttpSolrClient targeting the HTTP LB

      Problem description

      When the Solr node that receives the request has to forward it
      to a Solr Node that can actually perform the query, the response headers are added incorrectly to the response, causing any HTTP client to fail, whether it's a SolrClient or a basic HTTP client implementation with any other SDK.

      To simplify the case, let's try to start from the following repro scenario:

      • Start one node with cloud mode and port 8983
      • Create one single collection (1 shard, 1 replica)
      • Start another node with port 8984 and the previusly started zk (-z localhost:9983)
      • Start a java application and query the cluster using the node on port 8984 (the one that doesn't host the collection)

      So, then something like this happens:

      • The application queries node:8984 with compression enabled ("Accept-Encoding: gzip")
        and wt=javabin
      • Node:8984 can't perform the query and creates a http request behind the scenes to node:8983
      • Node:8983 returns a gzipped response with "Content-Encoding: gzip" and "Content-Type:
        Node:8984 adds the "Content-Encoding: gzip" header as character stream to the response
        (it should be forwarded as "Content-Encoding" header, not character encoding)
      • HttpSolrClient receives a "Content-Type: application/octet-stream;charset=gzip", causing
        an exception.
      • HttpSolrClient tries to quietly close the connection, but since the stream is broken,
        the Utils.consumeFully fails to actually consume the entity (it throws another exception in
        GzipDecompressingEntity#getContent() with "not in GZIP format")

      The exception thrown by HttpSolrClient is:

      java.nio.charset.UnsupportedCharsetException: gzip
       at java.nio.charset.Charset.forName(Charset.java:531)
       at org.apache.http.entity.ContentType.create(ContentType.java:271)
       at org.apache.http.entity.ContentType.create(ContentType.java:261)
       at org.apache.http.entity.ContentType.parse(ContentType.java:319)
       at org.apache.solr.client.solrj.impl.HttpSolrClient.executeMethod(HttpSolrClient.java:591)
       at org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.java:255)
       at org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.java:244)
       at org.apache.solr.client.solrj.SolrRequest.process(SolrRequest.java:194)
       at org.apache.solr.client.solrj.SolrClient.query(SolrClient.java:1015)
       at org.apache.solr.client.solrj.SolrClient.query(SolrClient.java:1031)
       at org.apache.solr.client.solrj.SolrClient$$FastClassBySpringCGLIB$$7fcf36a0.invoke(<generated>)
       at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)



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              houston Houston Putman
              samuelgmartinez Samuel García Martínez
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