Joe McDonnell created IMPALA-6530:
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Summary: Track time spent opening HDFS file handles
Key: IMPALA-6530
URL: https://issues.apache.org/jira/browse/IMPALA-6530
Project: IMPALA
Issue Type: Bug
Components: Backend
Affects Versions: Impala 2.11.0, Impala 2.10.0
Reporter: Joe McDonnell
Assignee: Joe McDonnell
When the HDFS NameNode is overloaded, opening an HDFS file handle can become a
time consuming operation and can become the bottleneck for the system.
Currently, there is no statistic tracking time spent opening file handles. This
limits the ability to determine the extent of the HDFS NameNode problem,
especially when given only a single query profile.
Impala should have a statistic at the HDFS scan node level tracking time spent
opening file handles.
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