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authorNithya Balachandran <nbalacha@redhat.com>2015-05-14 19:33:44 +0530
committerShyamsundar Ranganathan <srangana@redhat.com>2015-05-14 12:13:39 -0700
commit1cabc769c7b636f89f6f28aaa0d534401a82d4a8 (patch)
tree82a191bc5fc465de9ec5be9026d2c8eba9e61002 /xlators/cluster/dht/src/dht-rebalance.c
parent1d110ec14384292fff67b88150529a513b729c5c (diff)
dht/rebalance : Fixed rebalance failure
The rebalance process determines the local subvols for the node it is running on and only acts on files in those subvols. If a dist-rep or dist-disperse volume is created on 2 nodes by dividing the bricks equally across the nodes, one process might determine it has no local_subvols. When trying to update the commit hash, the function attempts to lock all local subvols. On the node with no local_subvols the dht inode lock operation fails, in turn causing the rebalance to fail. In a dist-rep volume with 2 nodes, if brick 0 of each replica set is on node1 and brick 1 is on node2, node2 will find that it has no local subvols. Change-Id: I7d73b5b4bf1c822eae6df2e6f79bd6a1606f4d1c BUG: 1221696 Signed-off-by: Nithya Balachandran <nbalacha@redhat.com> Reviewed-on: http://review.gluster.org/10786 Reviewed-by: Shyamsundar Ranganathan <srangana@redhat.com> Reviewed-by: Susant Palai <spalai@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com>
Diffstat (limited to 'xlators/cluster/dht/src/dht-rebalance.c')
-rw-r--r--xlators/cluster/dht/src/dht-rebalance.c15
1 files changed, 14 insertions, 1 deletions
diff --git a/xlators/cluster/dht/src/dht-rebalance.c b/xlators/cluster/dht/src/dht-rebalance.c
index 6ba9dd1e463..3ab73d4ef5b 100644
--- a/xlators/cluster/dht/src/dht-rebalance.c
+++ b/xlators/cluster/dht/src/dht-rebalance.c
@@ -2341,7 +2341,7 @@ gf_defrag_settle_hash (xlator_t *this, gf_defrag_info_t *defrag,
loc_t *loc, dict_t *fix_layout)
{
int ret;
-
+ dht_conf_t *conf = NULL;
/*
* Now we're ready to update the directory commit hash for the volume
* root, so that hash miscompares and broadcast lookups can stop.
@@ -2355,6 +2355,19 @@ gf_defrag_settle_hash (xlator_t *this, gf_defrag_info_t *defrag,
return 0;
}
+ conf = this->private;
+ if (!conf) {
+ /*Uh oh
+ */
+ return -1;
+ }
+
+ if (conf->local_subvols_cnt == 0) {
+ /* Commit hash updates are only done on local subvolumes
+ */
+ return 0;
+ }
+
ret = dict_set_uint32 (fix_layout, "new-commit-hash",
defrag->new_commit_hash);
if (ret) {