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break Flush wait for dropped CF 

Summary:
In FlushJob we dont do the Flush if the CF is dropped
https://github.com/facebook/rocksdb/blob/master/db/flush_job.cc#L184-L188

but inside WaitForFlushMemTable we keep waiting forever even if the CF is dropped.
Closes https://github.com/facebook/rocksdb/pull/1664

Differential Revision: D4321032

Pulled By: IslamAbdelRahman

fbshipit-source-id: 6e2b25d
This commit is contained in:
Islam AbdelRahman 2016-12-13 14:03:15 -08:00 committed by Facebook Github Bot
parent c3e5ee7154
commit 1a146f89c7
1 changed files with 6 additions and 0 deletions
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6
db/db_impl.cc
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@ -2937,6 +2937,12 @@ Status DBImpl::WaitForFlushMemTable(ColumnFamilyData* cfd) {
if (shutting_down_.load(std::memory_order_acquire)) {
return Status::ShutdownInProgress();
}
if (cfd->IsDropped()) {
// FlushJob cannot flush a dropped CF, if we did not break here
// we will loop forever since cfd->imm()->NumNotFlushed() will never
// drop to zero
return Status::InvalidArgument("Cannot flush a dropped CF");
}
bg_cv_.Wait();
}
if (!bg_error_.ok()) {