Quanlong Huang created IMPALA-9118:
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Summary: Add debug page for in-flight DDLs in catalogd
Key: IMPALA-9118
URL: https://issues.apache.org/jira/browse/IMPALA-9118
Project: IMPALA
Issue Type: New Feature
Reporter: Quanlong Huang
In a busy cluster, it's possible that many DDL/DML queries keep in the CREATED
state for several minutes. Especially when using with sync_ddl=true, tens of
minutes are also possible. They may be waiting for the ExecDdl RPC to catalogd
to finish.
It'd be helpful for debugging DDL/DML hangs if we can show the in-flight DDLs
in catalogd. I think the following fields are important:
* thread id
* coordinator
* db name / table name
* ddl type, e.g. AddPartition, DropTable, CreateTable, etc.
* last event, e.g. waiting for table lock, got table lock, loading file
metadata, etc.
* start time
* time elapsed
* (optional) params link to show the TDdlExecRequest in json format
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