s1monw commented on a change in pull request #1443:
URL: https://github.com/apache/lucene-solr/pull/1443#discussion_r412930075
##########
File path:
lucene/core/src/test/org/apache/lucene/index/TestConcurrentMergeScheduler.java
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@@ -657,4 +659,88 @@ protected void doStall() {
assertFalse(failed.get());
}
+
+ /*
+ * This test tries to produce 2 merges running concurrently with 2 segments
per merge. While these
+ * merges run we kick off a forceMerge that puts a pending merge in the
queue but waits for things to happen.
+ * While we do this we reduce maxMergeCount to 1. If concurrency in CMS is
not right the forceMerge will wait forever
+ * since non of the currently running merges picks up the pending merge.
This test fails every
+ */
+ public void testChangeMaxMergeCountyWhileForceMerge() throws IOException,
InterruptedException {
+ int numIters = TEST_NIGHTLY ? 100 : 10;
+ for (int iters = 0; iters < numIters; iters++) {
+ LogDocMergePolicy mp = new LogDocMergePolicy();
+ mp.setMergeFactor(2);
+ CountDownLatch forceMergeWaits = new CountDownLatch(1);
+ CountDownLatch mergeThreadsStartAfterWait = new CountDownLatch(1);
+ CountDownLatch mergeThreadsArrived = new CountDownLatch(2);
+ InfoStream stream = new InfoStream() {
+ @Override
+ public void message(String component, String message) {
Review comment:
yeah I take whatever I get in these cases :D
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