Tian Jiang created IOTDB-2270:
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Summary: Thread leaks in tests
Key: IOTDB-2270
URL: https://issues.apache.org/jira/browse/IOTDB-2270
Project: Apache IoTDB
Issue Type: Improvement
Components: Core/Cluster, Core/Engine
Reporter: Tian Jiang
Below are the confirmed thread leaks, which mainly affect tests as such threads
do not usually stop out of tests:
ClientManager stores a factory for each category of clients to create new
clients. When asynchronous servers are used, each factory contains several
selector threads to schedule asynchronous clients. Because ClientManager does
not provide a close() interface, the selectors will not be released after tests.
The thread pool for trimming WAL buffers in each virtual storage is not
referenced after being created, so the thread cannot be stopped.
A similar thread leak occurs to QueryFrequencyRecorder as its pool is not
referenced.
Some RaftMembers are not properly stopped, causing its background threads to
leak.
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