dongjoon-hyun commented on a change in pull request #20640: 
[SPARK-19755][Mesos] Blacklist is always active for 
MesosCoarseGrainedSchedulerBackend
URL: https://github.com/apache/spark/pull/20640#discussion_r328101913
 
 

 ##########
 File path: 
resource-managers/mesos/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosCoarseGrainedSchedulerBackend.scala
 ##########
 @@ -659,14 +660,8 @@ private[spark] class MesosCoarseGrainedSchedulerBackend(
           totalGpusAcquired -= gpus
           gpusByTaskId -= taskId
         }
-        // If it was a failure, mark the slave as failed for blacklisting 
purposes
         if (TaskState.isFailed(state)) {
-          slave.taskFailures += 1
-
-          if (slave.taskFailures >= MAX_SLAVE_FAILURES) {
-            logInfo(s"Blacklisting Mesos slave $slaveId due to too many 
failures; " +
-                "is Spark installed on it?")
-          }
+          logError(s"Mesos task $taskId failed on Mesos slave $slaveId.")
 
 Review comment:
   Shall we change this to `logInfo`?

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