ramkrishna.s.vasudevan created HBASE-24713:
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Summary: RS startup with FSHLog throws NPE after HBASE-21751
Key: HBASE-24713
URL: https://issues.apache.org/jira/browse/HBASE-24713
Project: HBase
Issue Type: Bug
Components: wal
Affects Versions: 2.1.6
Reporter: ramkrishna.s.vasudevan
Assignee: ramkrishna.s.vasudevan
Every RS startup creates this NPE
{code}
[sync.1] wal.FSHLog: UNEXPECTED
java.lang.NullPointerException
at
org.apache.hadoop.hbase.regionserver.wal.FSHLog$SyncRunner.run(FSHLog.java:582)
at java.lang.Thread.run(Thread.java:748)
2020-07-07 10:51:23,208 WARN [regionserver/xxxxx:16020] wal.FSHLog: Failed
sync-before-close but no outstanding appends; closing
WALjava.lang.NullPointerException
{code}
the reason is that the Disruptor frameworks starts the Syncrunner thread but
the init of the writer happens after that. A simple null check in the
Syncrunner will help here .
No major damage happens though since we are handle Throwable Exception. It will
good to solve this.
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