StefanRRichter commented on a change in pull request #6468: [FLINK-9900][tests] 
Include more information on timeout in Zookeeper HA ITCase
URL: https://github.com/apache/flink/pull/6468#discussion_r209236626
 
 

 ##########
 File path: 
flink-tests/src/test/java/org/apache/flink/test/checkpointing/ZooKeeperHighAvailabilityITCase.java
 ##########
 @@ -256,13 +262,54 @@ public FileVisitResult visitFile(Path file, 
BasicFileAttributes attrs) throws IO
                        () -> clusterClient.getJobStatus(jobID),
                        Time.milliseconds(50),
                        deadline,
-                       (jobStatus) -> jobStatus == JobStatus.FINISHED,
+                       JobStatus::isGloballyTerminalState,
                        TestingUtils.defaultScheduledExecutor());
-               assertEquals(JobStatus.FINISHED, jobStatusFuture.get());
+               try {
+                       assertEquals(JobStatus.FINISHED, jobStatusFuture.get());
+               } catch (Throwable e) {
+                       // include additional debugging information
+                       StringWriter error = new StringWriter();
+                       try (PrintWriter out = new PrintWriter(error)) {
+                               out.println("The job did not finish in time.");
+                               
out.println("allowedInitializeCallsWithoutRestore= " + 
CheckpointBlockingFunction.allowedInitializeCallsWithoutRestore.get());
+                               out.println("illegalRestores= " + 
CheckpointBlockingFunction.illegalRestores.get());
+                               out.println("successfulRestores= " + 
CheckpointBlockingFunction.successfulRestores.get());
+                               out.println("afterMessWithZooKeeper= " + 
CheckpointBlockingFunction.afterMessWithZooKeeper.get());
+                               out.println("failedAlready= " + 
CheckpointBlockingFunction.failedAlready.get());
+                               out.println("currentJobStatus= " + 
clusterClient.getJobStatus(jobID).get());
+                               out.println("numRestarts= " + 
RestartReporter.numRestarts.getValue());
+                               out.println("threadDump= " + 
generateThreadDump());
+                       }
+                       throw new AssertionError(error.toString(), 
ExceptionUtils.stripCompletionException(e));
+               }
 
                assertThat("We saw illegal restores.", 
CheckpointBlockingFunction.illegalRestores.get(), is(0));
        }
 
+       private static String generateThreadDump() {
+               final StringBuilder dump = new StringBuilder();
+               final ThreadMXBean threadMXBean = 
ManagementFactory.getThreadMXBean();
+               final ThreadInfo[] threadInfos = 
threadMXBean.getThreadInfo(threadMXBean.getAllThreadIds(), 100);
+               for (ThreadInfo threadInfo : threadInfos) {
+                       dump.append('"');
+                       dump.append(threadInfo.getThreadName());
+                       dump.append('"');
+                       final Thread.State state = threadInfo.getThreadState();
+                       dump.append(System.lineSeparator());
+                       dump.append("   java.lang.Thread.State: ");
+                       dump.append(state);
+                       final StackTraceElement[] stackTraceElements = 
threadInfo.getStackTrace();
+                       for (final StackTraceElement stackTraceElement : 
stackTraceElements) {
 
 Review comment:
   Could probably use `Throwable.printStackTrace(PrintWriter)` instead.

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