Apache
/
druid
mirror of https://github.com/apache/druid.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

ParallelCombiner: Fix buffer leak on exception in "combine". (#5630) 

Once a buffer is acquired, we need to make sure to release it if an
exception is thrown before the closeable iterator is created.
This commit is contained in:
Gian Merlino 2018-04-11 20:39:39 -04:00 committed by GitHub
parent e6efd75a3d
commit 72d6dcda4f
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 51 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
processing/src/main/java/io/druid/query/groupby/epinephelinae/ParallelCombiner.java
View File

@ -136,7 +136,11 @@ public class ParallelCombiner<KeyType>
)
{
// CombineBuffer is initialized when this method is called and closed after the result iterator is done
final Closer closer = Closer.create();
final ResourceHolder<ByteBuffer> combineBufferHolder = combineBufferSupplier.get();
closer.register(combineBufferHolder);
try {
final ByteBuffer combineBuffer = combineBufferHolder.get();
final int minimumRequiredBufferCapacity = StreamingMergeSortedGrouper.requiredBufferCapacity(
combineKeySerdeFactory.factorizeWithDictionary(mergedDictionary),
@ -168,13 +172,20 @@ public class ParallelCombiner<KeyType>
final CloseableIterator<Entry<KeyType>> combineIterator = Iterables.getOnlyElement(combineIteratorAndFutures.lhs);
final List<Future> combineFutures = combineIteratorAndFutures.rhs;
final Closer closer = Closer.create();
closer.register(combineBufferHolder);
closer.register(() -> checkCombineFutures(combineFutures));
return CloseableIterators.wrap(combineIterator, closer);
}
catch (Throwable t) {
try {
closer.close();
}
catch (Throwable t2) {
t.addSuppressed(t2);
}
throw t;
}
}
private static void checkCombineFutures(List<Future> combineFutures)
{