Parth Chandra created DRILL-1442:
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Summary: C++ Client - Synchronous API appears to hang when running
many queries in parallel
Key: DRILL-1442
URL: https://issues.apache.org/jira/browse/DRILL-1442
Project: Apache Drill
Issue Type: Bug
Components: Client - C++
Affects Versions: 0.5.0
Reporter: Parth Chandra
The C++ client library has a synchronous version that allows a client
application to submit multiple queries asynchronously but retrieve results in
synchronously.
A situation may occur where the application may submit several large queries
and then choose to process the results of the last submitted query first. In
this case the client library buffers up the results of the first few queries
and may hit its memory allocation limit before the last queries results are
retrieved.
The client app then deadlocks as the last query waits for more memory and the
first few queries wait for the app to consume the results.
Technically this would qualify as a client application bug, but the client
library should prevent or break the deadlock if it can.
At the vary least, the querySubmitter example program should not suffer from
this issue.
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