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From "ramkrishna.s.vasudevan (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-5200) AM.ProcessRegionInTransition() and AM.handleRegion() races thus leaving the region assignment inconsistent.
Date Sat, 14 Jan 2012 10:08:39 GMT
AM.ProcessRegionInTransition() and AM.handleRegion() races thus leaving the region assignment
inconsistent.
-----------------------------------------------------------------------------------------------------------

                 Key: HBASE-5200
                 URL: https://issues.apache.org/jira/browse/HBASE-5200
             Project: HBase
          Issue Type: Bug
            Reporter: ramkrishna.s.vasudevan
            Assignee: ramkrishna.s.vasudevan


This is the scenario
Consider a case where the balancer is going on thus trying to close regions in a RS.
Before we could close a master switch happens.  
On Master switch the set of nodes that are in RIT is collected and we first get Data and start
watching the node
After that the node data is added into RIT.
Now by this time (before adding to RIT) if the RS to which close was called does a transition
in AM.handleRegion() we miss the handling saying RIT state was null.
{code}
2012-01-13 10:50:46,358 WARN org.apache.hadoop.hbase.master.AssignmentManager: Received CLOSED
for region a66d281d231dfcaea97c270698b26b6f from server HOST-192-168-47-205,20020,1326363111288
but region was in  the state null and not in expected PENDING_CLOSE or CLOSING states
2012-01-13 10:50:46,358 WARN org.apache.hadoop.hbase.master.AssignmentManager: Received CLOSED
for region c12e53bfd48ddc5eec507d66821c4d23 from server HOST-192-168-47-205,20020,1326363111288
but region was in  the state null and not in expected PENDING_CLOSE or CLOSING states
2012-01-13 10:50:46,358 WARN org.apache.hadoop.hbase.master.AssignmentManager: Received CLOSED
for region 59ae13de8c1eb325a0dd51f4902d2052 from server HOST-192-168-47-205,20020,1326363111288
but region was in  the state null and not in expected PENDING_CLOSE or CLOSING states
2012-01-13 10:50:46,359 WARN org.apache.hadoop.hbase.master.AssignmentManager: Received CLOSED
for region f45bc9614d7575f35244849af85aa078 from server HOST-192-168-47-205,20020,1326363111288
but region was in  the state null and not in expected PENDING_CLOSE or CLOSING states
2012-01-13 10:50:46,359 WARN org.apache.hadoop.hbase.master.AssignmentManager: Received CLOSED
for region cc3ecd7054fe6cd4a1159ed92fd62641 from server HOST-192-168-47-204,20020,1326342744518
but region was in  the state null and not in expected PENDING_CLOSE or CLOSING states
2012-01-13 10:50:46,359 WARN org.apache.hadoop.hbase.master.AssignmentManager: Received CLOSED
for region 3af40478a17fee96b4a192b22c90d5a2 from server HOST-192-168-47-205,20020,1326363111288
but region was in  the state null and not in expected PENDING_CLOSE or CLOSING states
2012-01-13 10:50:46,359 WARN org.apache.hadoop.hbase.master.AssignmentManager: Received CLOSED
for region e6096a8466e730463e10d3d61f809b92 from server HOST-192-168-47-204,20020,1326342744518
but region was in  the state null and not in expected PENDING_CLOSE or CLOSING states
2012-01-13 10:50:46,359 WARN org.apache.hadoop.hbase.master.AssignmentManager: Received CLOSED
for region 4806781a1a23066f7baed22b4d237e24 from server HOST-192-168-47-204,20020,1326342744518
but region was in  the state null and not in expected PENDING_CLOSE or CLOSING states
2012-01-13 10:50:46,359 WARN org.apache.hadoop.hbase.master.AssignmentManager: Received CLOSED
for region d69e104131accaefe21dcc01fddc7629 from server HOST-192-168-47-205,20020,1326363111288
but region was in  the state null and not in expected PENDING_CLOSE or CLOSING states

{code}

In branch the CLOSING node is created by RS thus leading to more inconsistency.


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