Github user rmetzger commented on the pull request:
https://github.com/apache/flink/pull/838#issuecomment-112129807
The travis run for the previous commit (before your var name update) failed
with
```
java.lang.RuntimeException: Error while stopping YARN Application Client
at scala.concurrent.impl.Promise$DefaultPromise.ready(Promise.scala:219)
at scala.concurrent.impl.Promise$DefaultPromise.ready(Promise.scala:153)
at scala.concurrent.Await$$anonfun$ready$1.apply(package.scala:95)
at scala.concurrent.Await$$anonfun$ready$1.apply(package.scala:95)
at
scala.concurrent.BlockContext$DefaultBlockContext$.blockOn(BlockContext.scala:53)
at scala.concurrent.Await$.ready(package.scala:95)
at scala.concurrent.Await.ready(package.scala)
at
org.apache.flink.yarn.FlinkYarnCluster.shutdown(FlinkYarnCluster.java:420)
at
org.apache.flink.client.FlinkYarnSessionCli.stop(FlinkYarnSessionCli.java:461)
at
org.apache.flink.yarn.YarnTestBase$Runner.sendStop(YarnTestBase.java:514)
at org.apache.flink.yarn.YarnTestBase.runWithArgs(YarnTestBase.java:440)
at
org.apache.flink.yarn.YARNSessionFIFOITCase.testClientStartup(YARNSessionFIFOITCase.java:103)
```
Your change should actually not trigger this issue ... but it is happening
in the `shutdown()` method
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