[GitHub] [ozone] guihecheng commented on a change in pull request #2288: HDDS-5109. Track OM prepare intermittent integration test failure.

[GitBox <gi...@apache.org>]

guihecheng commented on a change in pull request #2288:
URL: https://github.com/apache/ozone/pull/2288#discussion_r642932590



##########
File path: hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/om/TestOzoneManagerPrepare.java
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@@ -408,21 +437,27 @@ private void assertClusterPrepared(long preparedIndex,
       LambdaTestUtils.await(WAIT_TIMEOUT_MILLIS,
           1000, () -> {
           if (!om.isRunning()) {
+            LOG.info("{} is not yet started.", om.getOMNodeId());
             return false;
           } else {
             boolean preparedAtIndex = false;
             OzoneManagerPrepareState.State state =
                 om.getPrepareState().getState();
 
+            LOG.info("{} has prepare status: {} index: {}.",
+                om.getOMNodeId(), state.getStatus(), state.getIndex());
+
             if (state.getStatus() == PrepareStatus.PREPARE_COMPLETED) {
-              if (state.getIndex() == preparedIndex) {
+              if (state.getIndex() >= expectedPreparedIndex) {
                 preparedAtIndex = true;
               } else {
                 // State will not change if we are prepared at the wrong index.

Review comment:
       IMHO, here we should consider a case: 2 successive prepares(just like the case testPrepareWithTransactions), we have a chance to get PREPARE_COMPLETED of the first round, then its index may be < expectedPreparedIndex of the second round,  because the status of om is async updated(just as we wait for it to update in prepare CLI).
   Maybe we could add a retry / sleep / wait for the updated prepare status? @errose28 




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