[HBASE-21144] AssignmentManager.waitForAssignment is not stable

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha-1, 2.2.0, 2.1.1, 2.0.3
• Component/s: amv2, test
• Hadoop Flags: Reviewed
• Assignee: Duo Zhang
• Reporter: Duo Zhang
• Created: 03/Sep/18 08:15
• Updated: 10/Sep/18 17:27
• Resolved: 10/Sep/18 09:45

Description

https://builds.apache.org/job/HBase-Flaky-Tests/job/master/366/artifact/hbase-server/target/surefire-reports/org.apache.hadoop.hbase.client.TestMetaWithReplicas-output.txt/*view*/

All replicas for meta table are on the same machine

2018-09-02 19:49:05,486 DEBUG [RS_OPEN_META-regionserver/asf904:0-0] handler.OpenRegionHandler(127): Opened hbase:meta,,1.1588230740 on asf904.gq1.ygridcore.net,47561,1535917740998
2018-09-02 19:49:32,802 DEBUG [RS_OPEN_META-regionserver/asf904:0-0] handler.OpenRegionHandler(127): Opened hbase:meta,,1_0001.534574363 on asf904.gq1.ygridcore.net,55408,1535917768453
2018-09-02 19:49:33,496 DEBUG [RS_OPEN_META-regionserver/asf904:0-0] handler.OpenRegionHandler(127): Opened hbase:meta,,1_0002.1657623790 on asf904.gq1.ygridcore.net,55408,1535917768453

But after calling am.waitForAssignment, the region location is still null...

2018-09-02 19:49:32,414 INFO  [Time-limited test] client.TestMetaWithReplicas(113): HBASE:META DEPLOY: hbase:meta,,1_0001.534574363 on null
2018-09-02 19:49:32,844 INFO  [Time-limited test] client.TestMetaWithReplicas(113): HBASE:META DEPLOY: hbase:meta,,1_0002.1657623790 on null

So we will not balance the replicas and cause TestMetaWithReplicas to hang forever...