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HBASE-2087 The wait on compaction because "Too many store files" 

holds up all flushing



git-svn-id: https://svn.apache.org/repos/asf/hadoop/hbase/trunk@930143 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Jean-Daniel Cryans 2010-04-02 00:55:03 +00:00
parent e1b5bff0f0
commit f60e26e771
2 changed files with 30 additions and 1 deletions
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2
CHANGES.txt
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@ -479,6 +479,8 @@ Release 0.21.0 - Unreleased
HBASE-2388 Give a very explicit message when we figure a big GC pause
HBASE-2270 Improve how we handle recursive calls in ExplicitColumnTracker
and WildcardColumnTracker
HBASE-2087 The wait on compaction because "Too many store files"
holds up all flushing
NEW FEATURES
HBASE-1961 HBase EC2 scripts

29
core/src/main/java/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.java
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@ -215,7 +215,25 @@ class MemStoreFlusher extends Thread implements FlushRequester {
* not flushed.
*/
private boolean flushRegion(HRegion region, boolean removeFromQueue) {
checkStoreFileCount(region);
// if removeFromQueue, then we come from flushSomeRegions and we need
// to block if there's too many store files. Else, we don't want to hang
// the main flushing thread so we'll just the region at the end of the
// queue if there's too many files.
if (removeFromQueue) {
checkStoreFileCount(region);
} else if (isTooManyStoreFiles(region)) {
LOG.warn("Region " + region.getRegionNameAsString() + " has too many " +
"store files, putting it back at the end of the flush queue.");
server.compactSplitThread.compactionRequested(region, getName());
// If there's only this item in the queue or they are all in this
// situation, we will loop at lot. Sleep a bit.
try {
Thread.sleep(1000);
} catch (InterruptedException e) { } // just continue
flushQueue.add(region);
// Tell a lie, it's not flushed but it's ok
return true;
}
synchronized (regionsInQueue) {
// See comment above for removeFromQueue on why we do not
// take the region out of the set. If removeFromQueue is true, remove it
@ -303,6 +321,15 @@ class MemStoreFlusher extends Thread implements FlushRequester {
}
}
private boolean isTooManyStoreFiles(HRegion region) {
for (Store hstore: region.stores.values()) {
if (hstore.getStorefilesCount() > this.blockingStoreFilesNumber) {
return true;
}
}
return false;
}
/**
* Check if the regionserver's memstore memory usage is greater than the
* limit. If so, flush regions with the biggest memstores until we're down