uschindler commented on code in PR #12199:
URL: https://github.com/apache/lucene/pull/12199#discussion_r1133699509


##########
lucene/core/src/java/org/apache/lucene/index/DocumentsWriterPerThreadPool.java:
##########
@@ -113,15 +113,19 @@ private synchronized DocumentsWriterPerThread newWriter() 
{
    * operation (add/updateDocument).
    */
   DocumentsWriterPerThread getAndLock() {
-    synchronized (this) {
-      ensureOpen();
-      DocumentsWriterPerThread dwpt = 
freeList.poll(DocumentsWriterPerThread::tryLock);
-      if (dwpt == null) {
-        dwpt = newWriter();
+    ensureOpen();
+    DocumentsWriterPerThread dwpt = 
freeList.poll(DocumentsWriterPerThread::tryLock);
+    if (dwpt == null) {

Review Comment:
   Thanks code looks much better. I was also irritated by the long chain of 
"tries" with and without synchronized. To me actualy code is easier to read.



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