Todd Lipcon created HIVE-21649:
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Summary: Passing an non-existent jar in HIVE_AUX_JARS_PATH
produces incorrect error message
Key: HIVE-21649
URL: https://issues.apache.org/jira/browse/HIVE-21649
Project: Hive
Issue Type: Bug
Components: Tez
Reporter: Todd Lipcon
I had configured HS2 with HIVE_AUX_JARS_PATH pointing to a non-existent
postgres jar. This resulted in queries failing with the following error:
{code}
tez.DagUtils: Localizing resource because it does not exist:
file:/data/1/todd/impala/fe/target/dependency/postgresql-42.2.5.jar to dest:
hdfs://localhost:20500/tmp/hive/todd/_tez_session_dir/9de357d5-59bf-4faa-8973-5212a08bc41a-resources/postgresql-42.2.5.jar
tez.DagUtils: Looks like another thread or process is writing the same file
tez.DagUtils: Waiting for the file
hdfs://localhost:20500/tmp/hive/todd/_tez_session_dir/9de357d5-59bf-4faa-8973-5212a08bc41a-resources/postgresql-42.2.5.jar
(5 attempts, with 5000ms interval)
tez.DagUtils: Could not find the jar that was being uploaded
{code}
This incorrect logging sent me on a wild goose chase looking for concurrency
issues, HDFS issues, etc, before I realized that the jar in fact didn't exist
on the local FS. This is due to some sketchy code which presumes that any
IOException is due to a writing conflict.
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