uschindler commented on code in PR #12199:
URL: https://github.com/apache/lucene/pull/12199#discussion_r1133798472
##########
lucene/core/src/java/org/apache/lucene/index/DocumentsWriterPerThreadPool.java:
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@@ -113,15 +113,17 @@ private synchronized DocumentsWriterPerThread newWriter()
{
* operation (add/updateDocument).
*/
DocumentsWriterPerThread getAndLock() {
- synchronized (this) {
- ensureOpen();
- DocumentsWriterPerThread dwpt =
freeList.poll(DocumentsWriterPerThread::tryLock);
- if (dwpt == null) {
- dwpt = newWriter();
- }
- // DWPT is already locked before return by this method:
- return dwpt;
+ ensureOpen();
+ DocumentsWriterPerThread dwpt =
freeList.poll(DocumentsWriterPerThread::tryLock);
+ if (dwpt == null) {
+ // newWriter() adds the DWPT to the `dwpts` set as a side-effect.
However it is not added to
+ // `freeList` at this point, it will be added later on once
DocumentsWriter has indexed a
+ // document into this DWPT and then gives it back to the pool by calling
+ // #marksAsFreeAndUnlock.
+ dwpt = newWriter();
Review Comment:
It was a joke!
My intention was the first comment, to invert the if logic so use "return on
success"
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