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authorAshish Pandey <aspandey@redhat.com>2016-06-17 17:52:56 +0530
committerPranith Kumar Karampuri <pkarampu@redhat.com>2016-07-25 23:07:03 -0700
commit558a45fa527b01ec81904150532a8b661c06ae8a (patch)
treea863a00777c87efef7d8bebad5833450cd967631 /xlators/cluster/dht
parentfc2a0f5eb8caae4f4fd0c023619954ed4b6ca760 (diff)
cluster/ec: Handle absence of keys in some callback dict
Problem: This issue arises when we do a rolling update from 3.7.5 to 3.7.9. For 4+2 volume running 3.7.5, if we update 2 nodes and after heal completion kill 2 older nodes, this problem can be seen. After update and killing of bricks, 2 nodes will return inodelk count key in dict while other 2 nodes will not have inodelk count in dict. This is also true for get-link-count. During dictionary match , ec_dict_compare, this will lead to mismatch of answers and the file operation on mount point will fail with IO error. Solution: Don't match inode, entry and link count keys while comparing two dictionaries. However, while combining the data in ec_dict_combine, go through all the dictionaries and select the maximum values received in different dicts for these keys. Change-Id: I33546e3619fe8f909286ee48fb0df2009cd3d22f BUG: 1347686 Signed-off-by: Ashish Pandey <aspandey@redhat.com> Reviewed-on: http://review.gluster.org/14761 Reviewed-by: Xavier Hernandez <xhernandez@datalab.es> Smoke: Gluster Build System <jenkins@build.gluster.org> Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com> CentOS-regression: Gluster Build System <jenkins@build.gluster.org> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
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