jixuan1989 opened a new pull request #2049:
URL: https://github.com/apache/iotdb/pull/2049
Current session Pool has some concurrency problems:
1.
public static void main() {
queryByRowRecord(); // this method open a new thread to use session.
Thread.sleep(1000);
pool.close(); // this method close pool.
}
Then the pool will clear all existing sessions, which may lead to some
leakage and deadlock.
2. `notifyAll()` is not called, which will lead to `wait(1000)` waits too
long time.
3. More log is printed.
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