The logic used in waiting for region servers during startup is broken
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Key: HBASE-5639
URL: https://issues.apache.org/jira/browse/HBASE-5639
Project: HBase
Issue Type: Bug
Reporter: Jean-Daniel Cryans
Assignee: nkeywal
Priority: Blocker
Fix For: 0.94.0
See the tail of HBASE-4993, which I'll report here:
Me:
{quote}
I think a bug was introduced here. Here's the new waiting logic in
waitForRegionServers:
the 'hbase.master.wait.on.regionservers.mintostart' is reached AND
there have been no new region server in for
'hbase.master.wait.on.regionservers.interval' time
And the code that verifies that:
!(lastCountChange+interval > now && count >= minToStart)
{quote}
Nic:
{quote}
It seems that changing the code to
(count < minToStart ||
lastCountChange+interval > now)
would make the code works as documented.
If you have 0 region servers that checked in and you are under the interval,
you wait: (true or true) = true.
If you have 0 region servers but you are above the interval, you wait: (true or
false) = true.
If you have 1 or more region servers that checked in and you are under the
interval, you wait: (false or true) = true.
{quote}
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