I reverted the recent changes to ObjectCacher. The problem is in
flush_set:
set<BufferHead*>::iterator next, it;
next = it = dirty_or_tx_bh.begin();
while (it != dirty_or_tx_bh.end()) {
next++;
BufferHead *bh = *it;
waitfor_commit.insert(bh->ob);
bh_write(bh);
it = next;
}
This resubmits IOs for writes that are already in flight. The fs client
in particular calls this a lot, overwhelming the OSDs with dup IOs and
stalling out completely. See
/a/sage-2014-07-25_17:14:20-fs-wip-msgr-testing-basic-plana
for a bunch of sample failures.
Probably easy to fix, but simply reverting for now!
sage
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