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Cloudera 6.2.1 -- Impala GC Overhead limit Exceeded

New Contributor

Which configuration of Impala can be changed to resolve this issue. PFA the screen Grab of error.



Super Collaborator

Hi @NeoImporter ,


The issue you are facing is because Catalog server does not have enough heap allocated to store the entire metadata. You can do below to increase the heap size for Catalog server.


  1. Using Cloudera Manager, navigate to Impala > Configuration > Java Heap Size of Catalog Server in Bytes
  2. Set heap size to at least 8 GB
  3. Save and Restart the Catalog server

Thanks and hope this helps!


Li Wang, Technical Solution Manager

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