RS should periodically ping its HLog pipeline even if no writes are arriving
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Key: HBASE-4274
URL: https://issues.apache.org/jira/browse/HBASE-4274
Project: HBase
Issue Type: Improvement
Components: regionserver, wal
Affects Versions: 0.92.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Priority: Critical
Fix For: 0.92.0
If you restart HDFS underneath HBase, when HBase isn't taking any write load,
the region servers won't "notice" that there's any problem until the next time
they take a write, at which point they will abort (because the pipeline is gone
from beneath them). It would be better if they wrote some garbage to their HLog
once every few seconds as a sort of keepalive, so they will aggressively abort
as soon as there's an issue.
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