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Hive / HCatalog Forum

Java heap size and GC limit exceed error when running Hive query

  • #43782

    I have HDP2 and getting the java heap size error when I run queries joining 2 or more tables ,each has about 1 to 4 million records.
    When I run query without any joins on a single table it works fine, when I do joins on smaller table it works fine.
    The java heap size currently is the default size the Ambari chose during the install
    I have a 2 node cluster and 24 GB ram on each.
    My replication factor is 3 which is the default.

    If I need to increase the heap size, which one should I increase and can I do thru Ambari ?
    Do I need to change the replication factor?

    Please advice

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