Bharath Vissapragada 9384b84552 HBASE-24075: Fix a race between master shutdown and metrics (re)init ... JMXCacheBuster resets the metrics state at various points in time. These events can potentially race with a master shutdown. When the master is tearing down, metrics initialization can touch a lot of unsafe state, for example invalidated FS objects. To avoid this, this patch makes the getMetrics() a no-op when the master is either stopped or in the process of shutting down. Additionally, getClusterId() when the server is shutting down is made a no-op. Simulating a test for this is a bit tricky but with the patch I don't locally see the long stacktraces from the jira. Signed-off-by: Michael Stack <stack@apache.org> (cherry picked from commit 6f213e9d5a)		2020-04-01 10:14:34 -07:00
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src	HBASE-24075: Fix a race between master shutdown and metrics (re)init	2020-04-01 10:14:34 -07:00
pom.xml	HBASE-24013 Bump branch-2 version to 2.4.0-SNAPSHOT (#1309)	2020-03-19 08:01:43 -07:00