Vaibhav Gumashta created HIVE-13725:
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Summary: ACID: Streaming API should synchronize calls when
multiple threads use the same endpoint
Key: HIVE-13725
URL: https://issues.apache.org/jira/browse/HIVE-13725
Project: Hive
Issue Type: Bug
Components: Metastore
Affects Versions: 2.0.0, 1.2.1
Reporter: Vaibhav Gumashta
Currently, the streaming endpoint creates a metastore client which gets used
for RPC. The client itself is not internally thread safe. Therefore, the API
methods should provide the relevant synchronization so that the methods can be
called from different threads. A sample use case is as follows:
1. Thread 1 creates a streaming endpoint and opens a txn batch.
2. Thread 2 heartbeats the txn batch.
With the current impl, this can result in an "out of sequence response", since
the response of the calls in thread1 might end up going to thread2 and
vice-versa.
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