[HBASE-15524] Fix NPE in client-side metrics

• Type: Sub-task
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.3.0
• Fix Version/s: 1.3.0, 2.0.0
• Component/s: Client, metrics
• Assignee: Mikhail Antonov
• Reporter: Mikhail Antonov
• Created: 24/Mar/16 00:20
• Updated: 06/Apr/18 04:34
• Resolved: 24/Mar/16 08:03

Description

java.lang.NullPointerException
at org.apache.hadoop.hbase.client.MetricsConnection.incrCacheDroppingExceptions(MetricsConnection.java:458)
at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.updateCachedLocations(ConnectionManager.java:2256)
at org.apache.hadoop.hbase.client.AsyncProcess$AsyncRequestFutureImpl.receiveGlobalFailure(AsyncProcess.java:1179)
at org.apache.hadoop.hbase.client.AsyncProcess$AsyncRequestFutureImpl.access$1200(AsyncProcess.java:600)
at org.apache.hadoop.hbase.client.AsyncProcess$AsyncRequestFutureImpl$SingleServerRequestRunnable.run(AsyncProcess.java:743)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

Issue Links

• is broken by: HBASE-15390 Unnecessary MetaCache evictions cause elevated number of requests to meta