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Posted to dev@hbase.apache.org by "Andrew Purtell (JIRA)" <ji...@apache.org> on 2014/12/10 02:30:13 UTC
[jira] [Resolved] (HBASE-12454) Setting didPerformCompaction early
in HRegion#compact
[ https://issues.apache.org/jira/browse/HBASE-12454?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andrew Purtell resolved HBASE-12454.
------------------------------------
Resolution: Fixed
Pushed to 0.98+
> Setting didPerformCompaction early in HRegion#compact
> -----------------------------------------------------
>
> Key: HBASE-12454
> URL: https://issues.apache.org/jira/browse/HBASE-12454
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.98.8
> Reporter: Andrew Purtell
> Assignee: Andrew Purtell
> Priority: Minor
> Fix For: 1.0.0, 2.0.0, 0.98.9
>
> Attachments: HBASE-12454-0.98.patch, HBASE-12454-v2.patch, HBASE-12454.patch, HBASE-12454.patch, HBASE-12454.patch
>
>
> It appears we are setting 'didPerformCompaction' to "true" before attempting the compaction in HRegion#compact. If Store#compact throws an exception or is interrupted, we won't call Store#cancelRequestedCompaction in the last finally block of the method as it looks like we should.
> {code}
> --- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
> +++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
> @@ -1540,58 +1540,58 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver {
> return false;
> }
>
> status = TaskMonitor.get().createStatus("Compacting " + store + " in " + this);
> if (this.closed.get()) {
> String msg = "Skipping compaction on " + this + " because closed";
> LOG.debug(msg);
> status.abort(msg);
> return false;
> }
> boolean wasStateSet = false;
> try {
> synchronized (writestate) {
> if (writestate.writesEnabled) {
> wasStateSet = true;
> ++writestate.compacting;
> } else {
> String msg = "NOT compacting region " + this + ". Writes disabled.";
> LOG.info(msg);
> status.abort(msg);
> return false;
> }
> }
> LOG.info("Starting compaction on " + store + " in region " + this
> + (compaction.getRequest().isOffPeak()?" as an off-peak compaction":""));
> doRegionCompactionPrep();
> try {
> status.setStatus("Compacting store " + store);
> - didPerformCompaction = true;
> store.compact(compaction);
> + didPerformCompaction = true;
> } catch (InterruptedIOException iioe) {
> String msg = "compaction interrupted";
> LOG.info(msg, iioe);
> status.abort(msg);
> return false;
> }
> } finally {
> if (wasStateSet) {
> synchronized (writestate) {
> --writestate.compacting;
> if (writestate.compacting <= 0) {
> writestate.notifyAll();
> }
> }
> }
> }
> status.markComplete("Compaction complete");
> return true;
> } finally {
> try {
> if (!didPerformCompaction) store.cancelRequestedCompaction(compaction); <-----
> if (status != null) status.cleanup();
> } finally {
> lock.readLock().unlock();
> }
> }
> }{code}
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