Solr
  1. Solr
  2. SOLR-1482

Solr master and slave freeze after query

    Details

    • Type: Bug Bug
    • Status: Resolved
    • Priority: Critical Critical
    • Resolution: Cannot Reproduce
    • Affects Version/s: 1.4
    • Fix Version/s: None
    • Component/s: None
    • Labels:
      None
    • Environment:

      Description

      We're having issues with the deployment of 2 master-slave setups.

      One of the master-slave setups is OK (so far) but on the other both the master and the slave keep freezing, but only after I send a query to them. And by freezing I mean indefinite hanging, with almost no output to log, no errors, nothing. It's as if there's some sort of a deadlock. The hanging servers need to be killed with -9, otherwise they keep hanging.

      The query I send queries all instances at the same time using the ?shards= syntax.

      On the slave, the logs just stop - nothing shows up anymore after the query is issued. On the master, they're a bit more descriptive. This information seeps through very-very slowly, as you can see from the timestamps:

      SEVERE: java.lang.OutOfMemoryError: PermGen space

      Oct 1, 2009 2:16:00 PM org.apache.solr.common.SolrException log
      SEVERE: java.lang.OutOfMemoryError: PermGen space

      Oct 1, 2009 2:19:37 PM org.apache.catalina.connector.CoyoteAdapter service
      SEVERE: An exception or error occurred in the container during the request processing
      java.lang.OutOfMemoryError: PermGen space
      Oct 1, 2009 2:19:37 PM org.apache.coyote.http11.Http11Processor process
      SEVERE: Error processing request
      java.lang.OutOfMemoryError: PermGen space
      Oct 1, 2009 2:19:39 PM org.apache.catalina.connector.CoyoteAdapter service
      SEVERE: An exception or error occurred in the container during the request processing
      java.lang.OutOfMemoryError: PermGen space
      Exception in thread "ContainerBackException in thread "pool-29-threadOct 1, 2009 2:21:47 PM org.apache.catalina.connector.CoyoteAdapter service
      SEVERE: An exception or error occurred in the container during the request processing
      java.lang.OutOfMemoryError: PermGen space
      Oct 1, 2009 2:21:47 PM org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler process
      SEVERE: Error reading request, ignored
      java.lang.OutOfMemoryError: PermGen space
      Oct 1, 2009 2:21:47 PM org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler process
      SEVERE: Error reading request, ignored
      java.lang.OutOfMemoryError: PermGen space
      -22" java.lang.OutOfMemoryError: PermGen space
      Oct 1, 2009 2:21:47 PM org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler process
      SEVERE: Error reading request, ignored
      java.lang.OutOfMemoryError: PermGen space
      Exception in thread "http-8080-42" Oct 1, 2009 2:21:47 PM org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler process
      SEVERE: Error reading request, ignored
      java.lang.OutOfMemoryError: PermGen space
      Oct 1, 2009 2:21:47 PM org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler process
      SEVERE: Error reading request, ignored
      java.lang.OutOfMemoryError: PermGen space
      Oct 1, 2009 2:21:47 PM org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler process
      SEVERE: Error reading request, ignored
      java.lang.OutOfMemoryError: PermGen space
      Exception in thread "http-8080-26" Exception in thread "http-8080-32" Exception in thread "http-8080-25" Exception in thread "http-8080-22" Exception in thread "http-8080-15" Exception in thread "http-8080-45" Exception in thread "http-8080-13" Exception in thread "http-8080-48" Exception in thread "http-8080-7" Exception in thread "http-8080-38" Exception in thread "http-8080-39" Exception in thread "http-8080-28" Exception in thread "http-8080-1" Exception in thread "http-8080-2" Exception in thread "http-8080-12" Exception in thread "http-8080-44" Exception in thread "http-8080-47" Exception in thread "http-8080-29" Exception in thread "http-8080-33" Exception in thread "http-8080-27" Exception in thread "http-8080-36" Exception in thread "http-8080-113" Exception in thread "http-8080-112" Exception in thread "http-8080-37" Exception in thread "http-8080-18" java.lang.OutOfMemoryError: PermGen space
      java.lang.OutOfMemoryError: PermGen space
      java.lang.OutOfMemoryError: PermGen space
      java.lang.OutOfMemoryError: PermGen space
      java.lang.OutOfMemoryError: PermGen space
      Exception in thread "http-8080-34" java.lang.OutOfMemoryError: PermGen space
      java.lang.OutOfMemoryError: PermGen space
      Exception in thread "http-8080-103"

      So the problem seems to be related to PermGen space. I found http://www.nabble.com/Number-of-webapps-td22198080.html and tried -XX:MaxPermSize=256m, but it didn't fix the problem. The current CATALINA_OPTS looks like this:

      export CATALINA_OPTS="-XX:MaxPermSize=256m -Xmx6500m -XX:+UseConcMarkSweepGC"

      Is the only solution at this point going multicore, as Noble suggested (is Noble your first name? I always assumed it was Paul and Noble was part of the nickname)? Will multicore get rid of the problem, before we spend time looking at it? For multicore, will the existing data dirs be compatible or would a complete reindex be needed?

      I'm willing to provide any information to you guys, just not sure what at the moment. I'm also open to communicating outside of JIRA, at artem [_aT_] plaxo

      {dot}

      com.

      Thanks.

      1. catalina.out
        87 kB
        Artem Russakovskii
      2. catalina2.out
        167 kB
        Artem Russakovskii

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          People

          • Assignee:
            Unassigned
            Reporter:
            Artem Russakovskii
          • Votes:
            1 Vote for this issue
            Watchers:
            4 Start watching this issue

            Dates

            • Created:
              Updated:
              Resolved:

              Development