ankitsultana commented on code in PR #11558:
URL: https://github.com/apache/pinot/pull/11558#discussion_r1321683982
##########
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/realtime/impl/invertedindex/RealtimeLuceneTextIndex.java:
##########
@@ -109,27 +112,46 @@ public ImmutableRoaringBitmap getDictIds(String
searchQuery) {
@Override
public MutableRoaringBitmap getDocIds(String searchQuery) {
MutableRoaringBitmap docIDs = new MutableRoaringBitmap();
- Collector docIDCollector = new RealtimeLuceneDocIdCollector(docIDs);
- IndexSearcher indexSearcher = null;
- try {
- Query query = new QueryParser(_column, _analyzer).parse(searchQuery);
- indexSearcher = _searcherManager.acquire();
- indexSearcher.search(query, docIDCollector);
- return getPinotDocIds(indexSearcher, docIDs);
- } catch (Exception e) {
- LOGGER
- .error("Failed while searching the realtime text index for column
{}, search query {}, exception {}", _column,
- searchQuery, e.getMessage());
- throw new RuntimeException(e);
- } finally {
+ RealtimeLuceneDocIdCollector docIDCollector = new
RealtimeLuceneDocIdCollector(docIDs);
+ // A thread interrupt during indexSearcher.search() can break the
underlying FSDirectory used by the IndexWriter
+ // which the SearcherManager is created with. To ensure the index is never
corrupted the search is executed
+ // in a child thread and the interrupt is handled in the current thread by
canceling the search gracefully
+ Callable<MutableRoaringBitmap> searchCallable = () -> {
+ IndexSearcher indexSearcher = null;
try {
- if (indexSearcher != null) {
- _searcherManager.release(indexSearcher);
+ Query query = new QueryParser(_column, _analyzer).parse(searchQuery);
+ indexSearcher = _searcherManager.acquire();
+ indexSearcher.search(query, docIDCollector);
+ return getPinotDocIds(indexSearcher, docIDs);
+ } finally {
+ try {
+ if (indexSearcher != null) {
+ _searcherManager.release(indexSearcher);
+ }
+ } catch (Exception e) {
+ LOGGER.error(
+ "Failed while releasing the searcher manager for realtime text
index for column {}, exception {}",
+ _column, e.getMessage());
+ }
+ }
+ };
+ FutureTask<MutableRoaringBitmap> searchTask = new
FutureTask<>(searchCallable);
+ Thread searcherThread = new Thread(searchTask);
+ searcherThread.start();
Review Comment:
Starting a new thread for each query is not ideal. You can configure a
ThreadPoolExecutor to run the Futures instead?
##########
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/realtime/impl/invertedindex/RealtimeLuceneTextIndex.java:
##########
@@ -109,27 +112,46 @@ public ImmutableRoaringBitmap getDictIds(String
searchQuery) {
@Override
public MutableRoaringBitmap getDocIds(String searchQuery) {
MutableRoaringBitmap docIDs = new MutableRoaringBitmap();
- Collector docIDCollector = new RealtimeLuceneDocIdCollector(docIDs);
- IndexSearcher indexSearcher = null;
- try {
- Query query = new QueryParser(_column, _analyzer).parse(searchQuery);
- indexSearcher = _searcherManager.acquire();
- indexSearcher.search(query, docIDCollector);
- return getPinotDocIds(indexSearcher, docIDs);
- } catch (Exception e) {
- LOGGER
- .error("Failed while searching the realtime text index for column
{}, search query {}, exception {}", _column,
- searchQuery, e.getMessage());
- throw new RuntimeException(e);
- } finally {
+ RealtimeLuceneDocIdCollector docIDCollector = new
RealtimeLuceneDocIdCollector(docIDs);
+ // A thread interrupt during indexSearcher.search() can break the
underlying FSDirectory used by the IndexWriter
+ // which the SearcherManager is created with. To ensure the index is never
corrupted the search is executed
+ // in a child thread and the interrupt is handled in the current thread by
canceling the search gracefully
+ Callable<MutableRoaringBitmap> searchCallable = () -> {
+ IndexSearcher indexSearcher = null;
try {
- if (indexSearcher != null) {
- _searcherManager.release(indexSearcher);
+ Query query = new QueryParser(_column, _analyzer).parse(searchQuery);
+ indexSearcher = _searcherManager.acquire();
+ indexSearcher.search(query, docIDCollector);
+ return getPinotDocIds(indexSearcher, docIDs);
+ } finally {
+ try {
+ if (indexSearcher != null) {
+ _searcherManager.release(indexSearcher);
+ }
+ } catch (Exception e) {
+ LOGGER.error(
+ "Failed while releasing the searcher manager for realtime text
index for column {}, exception {}",
+ _column, e.getMessage());
+ }
+ }
+ };
+ FutureTask<MutableRoaringBitmap> searchTask = new
FutureTask<>(searchCallable);
+ Thread searcherThread = new Thread(searchTask);
+ searcherThread.start();
+ try {
+ while (!searchTask.isDone()) {
Review Comment:
Could the same behavior be achieved by using `Object.wait()`?
Essentially you create a dummy object, say "LuceneNotifier" and pass it to
the search callable. The search callable will call `luceneNotifier.notify()` in
the finally block. And the while loop would be replaced with something like
this:
```
try {
luceneNotifier.wait();
// code reaches here if notify was call after success/failure
} catch (InterruptedException e) {
// this gets called if the thread was interrupted
docIdCollector.markShouldCancel();
}
```
##########
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/realtime/impl/invertedindex/RealtimeLuceneTextIndex.java:
##########
@@ -109,27 +112,46 @@ public ImmutableRoaringBitmap getDictIds(String
searchQuery) {
@Override
public MutableRoaringBitmap getDocIds(String searchQuery) {
MutableRoaringBitmap docIDs = new MutableRoaringBitmap();
- Collector docIDCollector = new RealtimeLuceneDocIdCollector(docIDs);
- IndexSearcher indexSearcher = null;
- try {
- Query query = new QueryParser(_column, _analyzer).parse(searchQuery);
- indexSearcher = _searcherManager.acquire();
- indexSearcher.search(query, docIDCollector);
- return getPinotDocIds(indexSearcher, docIDs);
- } catch (Exception e) {
- LOGGER
- .error("Failed while searching the realtime text index for column
{}, search query {}, exception {}", _column,
- searchQuery, e.getMessage());
- throw new RuntimeException(e);
- } finally {
+ RealtimeLuceneDocIdCollector docIDCollector = new
RealtimeLuceneDocIdCollector(docIDs);
+ // A thread interrupt during indexSearcher.search() can break the
underlying FSDirectory used by the IndexWriter
+ // which the SearcherManager is created with. To ensure the index is never
corrupted the search is executed
+ // in a child thread and the interrupt is handled in the current thread by
canceling the search gracefully
Review Comment:
would be good to link this in the comments here:
https://github.com/apache/lucene/issues/9309
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
