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Old 04-16-2008, 02:32 PM
Default Cluster Project branch, master, updated. gfs-kernel_0_1_22-180-ga187481

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- Log -----------------------------------------------------------------
commit a187481779ec3a5321c92a9f9ae587dcacd64d48
Author: David Teigland <teigland@redhat.com>
Date: Wed Apr 16 09:22:27 2008 -0500

gfs_controld: retry recovery for withdrawn journal

bz 442451

This is unfortunate, but seems to be the best solution available. The
problem, described more fully in the bz, is that when gfs_controld tries
to do recovery on a journal for a withdraw, the withdrawing node may not
yet have cleared its dlm locks. This means the journal lock may still be
held by the withdrawing node, causing all the recovering node(s) to fail
acquiring it, and no one does the recovery. The solution is for all
recovering nodes to retry recovery of a withdrawn journal until they
succeed (only the first to get the journal lock will actually recover
it, the others will see it's recovered and report success.)

Signed-off-by: David Teigland <teigland@redhat.com>


Summary of changes:
group/gfs_controld/recover.c | 19 +++++++++++++++++++
1 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/group/gfs_controld/recover.c b/group/gfs_controld/recover.c
index 9ce3aa7..52d96ff 100644
--- a/group/gfs_controld/recover.c
+++ b/group/gfs_controld/recover.c
@@ -1913,6 +1913,25 @@ int kernel_recovery_done(char *table)

switch (atoi(buf)) {
+ /*
+ * This is unfortunate; it's needed for bz 442451 where
+ * gfs-kernel fails to acquire the journal lock on all nodes
+ * because a withdrawing node has not yet called
+ * dlm_release_lockspace() to free it's journal lock. With
+ * this, all nodes should repeatedly try to to recover the
+ * journal of the withdrawn node until the withdrawing node
+ * clears its dlm locks, and gfs on each of the remaining nodes
+ * succeeds in doing the recovery.
+ */
+ if (memb->withdrawing) {
+ log_group(mg, "recovery_done jid %d nodeid %d retry "
+ "for withdraw", memb->jid, memb->nodeid);
+ memb->tell_gfs_to_recover = 1;
+ memb->wait_gfs_recover_done = 0;
+ usleep(500000);
+ }
memb->local_recovery_status = RS_GAVEUP;
ss = "gaveup";

Cluster Project

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