Sandeep Guggilam created HBASE-25032:
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Summary: Wait for region server to become online before
considering it online in Master
Key: HBASE-25032
URL: https://issues.apache.org/jira/browse/HBASE-25032
Project: HBase
Issue Type: Bug
Reporter: Sandeep Guggilam
Assignee: Sandeep Guggilam
As part of RS start up, RS reports for duty to Master . Master acknowledges the
request and adds it to the onlineServers list for further assigning any regions
to the RS
Once Master acknowledges the reportForDuty and sends back the response, RS does
a bunch of stuff like initializing replication sources etc before becoming
online. However, sometimes there could be an issue with initializing
replication sources when it is unable to connect to peer clusters because of
some kerberos configuration and there would be a delay of around 20 mins in
becoming online.
Since master considers it online, it tries to assign regions and which fails
with ServerNotRunningYet exception, then the master tries to unassign which
again fails with the same exception leading the region to FAILED_CLOSE state.
It would be good to have a check to see if the RS is ready to accept the
assignment requests before adding it to online servers list which would account
for any such delays as described above
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