vinothchandar commented on issue #943: HUDI-290 Normalize test class name of 
all test classes
URL: https://github.com/apache/incubator-hudi/pull/943#issuecomment-540515034
 
 
   https://travis-ci.org/apache/incubator-hudi/builds  has been pretty stable 
as you can see.. Log is full of the following type of errors talking to the 
Mini DFS cluster
   
   ```
   org.apache.hudi.exception.HoodieIOException: Could not check if dataset 
hdfs://localhost:40221/user/travis/continuous_mor is valid dataset
        at 
org.apache.hudi.exception.DatasetNotFoundException.checkValidDataset(DatasetNotFoundException.java:53)
        at 
org.apache.hudi.common.table.HoodieTableMetaClient.<init>(HoodieTableMetaClient.java:104)
        at 
org.apache.hudi.common.table.HoodieTableMetaClient.<init>(HoodieTableMetaClient.java:90)
        at 
org.apache.hudi.common.table.HoodieTableMetaClient.<init>(HoodieTableMetaClient.java:85)
        at 
org.apache.hudi.utilities.TestHoodieDeltaStreamer$TestHelpers.assertAtleastNDeltaCommits(TestHoodieDeltaStreamer.java:243)
        at 
org.apache.hudi.utilities.TestHoodieDeltaStreamer.lambda$testUpsertsContinuousMode$1(TestHoodieDeltaStreamer.java:384)
        at 
org.apache.hudi.utilities.TestHoodieDeltaStreamer$TestHelpers.lambda$waitTillCondition$0(TestHoodieDeltaStreamer.java:268)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
   Caused by: java.net.ConnectException: Call From localhost/127.0.0.1 to 
localhost:40221 failed on connection exception: java.net.ConnectException: 
Connection refused; For more details see:  
http://wiki.apache.org/hadoop/ConnectionRefused
        at sun.reflect.GeneratedConstructorAccessor157.newInstance(Unknown 
Source)
        at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:792)
        at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:732)
        at org.apache.hadoop.ipc.Client.call(Client.java:1479)
        at org.apache.hadoop.ipc.Client.call(Client.java:1412)
   ```
   
   So this passes locally for you and just fails on travis? right? 

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