[HBASE-21928] Deprecated HConstants.META_QOS

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha-1, 2.2.0, 2.3.0
• Component/s: Client, rpc
• Hadoop Flags: Reviewed
• Release Note: Mark HConstants.META_QOS as deprecated. It is for internal use only, which is the highest priority. You should not try to set a priority greater than or equal to this value, although it is no harm but also useless.
• Assignee: Duo Zhang
• Reporter: Zheng Hu
• Created: 19/Feb/19 03:11
• Updated: 24/Jun/22 19:06
• Resolved: 20/Feb/19 06:59

Description

[INFO] Running org.apache.hadoop.hbase.master.TestServerCrashProcedureCarryingMetaStuck
[ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 41.604 s <<< FAILURE! - in org.apache.hadoop.hbase.master.TestServerCrashProcedureCarryingMetaStuck
[ERROR] test(org.apache.hadoop.hbase.master.TestServerCrashProcedureCarryingMetaStuck) Time elapsed: 30.496 s <<< ERROR!
java.util.concurrent.TimeoutException
at org.apache.hadoop.hbase.master.TestServerCrashProcedureCarryingMetaStuck.test(TestServerCrashProcedureCarryingMetaStuck.java:93)

The META_QOS is introduced by HBASE-21754 and misused in HBASE-21907 as the name is a bit ambiguous. To prevent misusing in the future, let's deprecated the META_QOS in HConstants, and introduce a META_TRANSITION_QOS somewhere that is not IA.Public.

Issue Links

• is caused by: HBASE-21907 Should set priority for rpc request
• is related to: HBASE-21754 ReportRegionStateTransitionRequest should be executed in priority executor
• links to: Review Board