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https://issues.apache.org/jira/browse/HBASE-12402?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Enis Soztutar updated HBASE-12402:
----------------------------------
Attachment: hbase-12402_v1.patch
This is a tentative patch, not tested yet. It is not easy to create a reproduce
for this issue.
> ZKPermissionWatcher race condition in refreshing the cache leaving stale ACLs
> and causing AccessDenied
> ------------------------------------------------------------------------------------------------------
>
> Key: HBASE-12402
> URL: https://issues.apache.org/jira/browse/HBASE-12402
> Project: HBase
> Issue Type: Bug
> Reporter: Enis Soztutar
> Assignee: Enis Soztutar
> Fix For: 2.0.0, 0.98.8, 0.99.2
>
> Attachments: hbase-12402_v1.patch
>
>
> In testing, we have seen an issue where a region in a newly created table
> will throw AccessDeniedException.
> There seems to be a race condition in the ZKPermissionWatcher when it is just
> starting up, and a new table is created around the same time.
> The master just created the table, and adds permissions to acl table:
> {code}
> 2014-10-30 19:21:26,494 DEBUG
> [MASTER_TABLE_OPERATIONS-ip-172-31-32-87:60000-0] access.AccessControlLists:
> Writing permission with rowKey loadtest_d1 hrt_qa: RWXCA
> {code}
> One of the region servers is just starting:
> {code}
> Thu Oct 30 19:21:11 UTC 2014 Starting regionserver on ip-172-31-32-90
> 2014-10-30 19:21:13,915 INFO [main] util.VersionInfo: HBase
> 0.98.4.2.2.0.0-1194-hadoop2
> {code}
> The node creation event is received
> {code}
> 2014-10-30 19:21:26,764 DEBUG [regionserver60020-EventThread]
> access.ZKPermissionWatcher: Updating permissions cache from node loadtest_d1
> with data:
> PBUF\x0A0\x0A\x06hrt_qa\x12&\x08\x03""\x0A\x16\x0A\x07default\x12\x0Bloadtest_d1
> \x00 \x01 \x02 \x03 \x04
> {code}
> which put the write data to the cache, only to be invalidated later shortly:
> {code}
> ...
> 2014-10-30 19:21:26,855 DEBUG [RS_OPEN_REGION-ip-172-31-32-90:60020-1]
> access.ZKPermissionWatcher: Updating permissions cache from node
> tabletwo_copytable_cell_versions_two with data:
> PBUF\x0AI\x0A\x06hrt_qa\x12?\x08\x03";\x0A/\x0A\x07default\x12$tabletwo_copytable_cell_versions_two
> \x00 \x01 \x02 \x03 \x04
> 2014-10-30 19:21:26,856 DEBUG [RS_OPEN_REGION-ip-172-31-32-90:60020-1]
> access.ZKPermissionWatcher: Updating permissions cache from node loadtest_d1
> with data: PBUF
> 2014-10-30 19:21:26,856 DEBUG [RS_OPEN_REGION-ip-172-31-32-90:60020-1]
> access.ZKPermissionWatcher: Updating permissions cache from node
> tablefour_cell_version_snapshots_copy with data: PBUF
> ...
> {code}
> Notice that the threads are different. The first one is the zk event
> notification thread, vs the other is the thread from OpenRegionHandler.
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