doc : release-notes for GlusterFS-3.12.6v3.12.6

Change-Id: I3b5e3a0cee2d773db2e10d1444a43cfafe33c4a3
BUG: 1541249
Signed-off-by: Jiffin Tony Thottan <jthottan@redhat.com>

1 files changed, 32 insertions, 0 deletions

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+# Release notes for Gluster 3.12.6
+
+This is a bugfix release. The release notes for [3.12.0](3.12.0.md), [3.12.1](3.12.1.md), [3.12.2](3.12.2.md), [3.12.3](3.12.3.md), [3.12.4](3.12.4.md), [3.12.5](3.12.5.md), [3.12.5](3.12.6.md) contain a listing of all the new features that were added and bugs fixed in the GlusterFS 3.12 stable release.
+
+## Major issues
+1. Expanding a gluster volume that is sharded may cause file corruption
+    - Sharded volumes are typically used for VM images, if such volumes are
+  expanded or possibly contracted (i.e add/remove bricks and rebalance) there
+  are reports of VM images getting corrupted.
+    - The last known cause for corruption #1465123 is still pending, and not yet
+    part of this release.
+
+## Bugs addressed
+
+     A total of 16 patches have been merged, addressing 16 bugs
+- [#1510342](https://bugzilla.redhat.com/1510342): Not all files synced using geo-replication
+- [#1533269](https://bugzilla.redhat.com/1533269): Random GlusterFSD process dies during rebalance
+- [#1534847](https://bugzilla.redhat.com/1534847): entries not getting cleared post healing of softlinks (stale entries showing up in heal info)
+- [#1536334](https://bugzilla.redhat.com/1536334): [Disperse] Implement open fd heal for disperse volume
+- [#1537346](https://bugzilla.redhat.com/1537346): glustershd/glusterd is not using right port when connecting to glusterfsd process
+- [#1539516](https://bugzilla.redhat.com/1539516): DHT log messages: Found anomalies in (null) (gfid = 00000000-0000-0000-0000-000000000000). Holes=1 overlaps=0
+- [#1540224](https://bugzilla.redhat.com/1540224): dht_(f)xattrop does not implement migration checks
+- [#1541267](https://bugzilla.redhat.com/1541267): dht_layout_t leak in dht_populate_inode_for_dentry
+- [#1541930](https://bugzilla.redhat.com/1541930): A down brick is incorrectly considered to be online and makes the volume to be started without any brick available
+- [#1542054](https://bugzilla.redhat.com/1542054): tests/bugs/cli/bug-1169302.t fails spuriously
+- [#1542475](https://bugzilla.redhat.com/1542475): Random failures in tests/bugs/nfs/bug-974972.t
+- [#1542601](https://bugzilla.redhat.com/1542601): The used space in the volume increases when the volume is expanded
+- [#1542615](https://bugzilla.redhat.com/1542615): tests/bugs/core/multiplex-limit-issue-151.t  fails sometimes in upstream master
+- [#1542826](https://bugzilla.redhat.com/1542826): Mark tests/bugs/posix/bug-990028.t bad on release-3.12
+- [#1542934](https://bugzilla.redhat.com/1542934): Seeing timer errors in the rebalance logs
+- [#1543016](https://bugzilla.redhat.com/1543016): dht_lookup_unlink_of_false_linkto_cbk fails with "Permission denied"
+- [#1544637](https://bugzilla.redhat.com/1544637): 3.8 -> 3.10 rolling upgrade fails (same for 3.12 or 3.13) on Ubuntu 14