Saisai Shao created SPARK-14423:
-----------------------------------
Summary: Handle jar conflict issue when uploading to distributed
cache
Key: SPARK-14423
URL: https://issues.apache.org/jira/browse/SPARK-14423
Project: Spark
Issue Type: Bug
Components: YARN
Affects Versions: 2.0.0
Reporter: Saisai Shao
Currently with the introduction of assembly-free deployment of Spark, by
default yarn#client will upload all the jars in assembly to HDFS staging
folder. If the jars in assembly and specified with \--jars have the same name,
this will introduce exception while downloading these jars and make the
application fail to run.
Here is the exception when running example with {{run-example}}:
{noformat}
16/04/06 10:29:48 INFO Client: Application report for
application_1459907402325_0004 (state: FAILED)
16/04/06 10:29:48 INFO Client:
client token: N/A
diagnostics: Application application_1459907402325_0004 failed 2 times
due to AM Container for appattempt_1459907402325_0004_000002 exited with
exitCode: -1000
For more detailed output, check application tracking
page:http://hw12100.local:8088/proxy/application_1459907402325_0004/Then, click
on links to logs of each attempt.
Diagnostics: Resource
hdfs://localhost:8020/user/sshao/.sparkStaging/application_1459907402325_0004/avro-mapred-1.7.7-hadoop2.jar
changed on src filesystem (expected 1459909780508, was 1459909782590
java.io.IOException: Resource
hdfs://localhost:8020/user/sshao/.sparkStaging/application_1459907402325_0004/avro-mapred-1.7.7-hadoop2.jar
changed on src filesystem (expected 1459909780508, was 1459909782590
at org.apache.hadoop.yarn.util.FSDownload.copy(FSDownload.java:253)
at org.apache.hadoop.yarn.util.FSDownload.access$000(FSDownload.java:61)
at org.apache.hadoop.yarn.util.FSDownload$2.run(FSDownload.java:359)
at org.apache.hadoop.yarn.util.FSDownload$2.run(FSDownload.java:357)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
at org.apache.hadoop.yarn.util.FSDownload.call(FSDownload.java:356)
at org.apache.hadoop.yarn.util.FSDownload.call(FSDownload.java:60)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
{noformat}
The problem is that this jar {{avro-mapred-1.7.7-hadoop2.jar}} both existed in
assembly and example folder.
We should handle this situation, since now spark example is failed to run under
yarn mode.
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