onedigit commented on pull request #170:
URL: https://github.com/apache/incubator-livy/pull/170#issuecomment-703122226
This problem persists in the current master. I believe the PR from
@akitanaka is needed to solve this problem
```
at
org.apache.livy.utils.SparkYarnApp$.yarnClient(SparkYarnApp.scala:52)
at
org.apache.livy.utils.SparkYarnApp$$anon$1.run(SparkYarnApp.scala:78)
Caused by: java.lang.ClassNotFoundException:
javax.ws.rs.ext.MessageBodyReader
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
... 54 more
java.lang.NoClassDefFoundError: Could not initialize class
org.apache.hadoop.yarn.util.timeline.TimelineUtils
at
org.apache.hadoop.yarn.client.api.impl.YarnClientImpl.serviceInit(YarnClientImpl.java:200)
at
org.apache.hadoop.service.AbstractService.init(AbstractService.java:164)
at
org.apache.livy.utils.SparkYarnApp$.yarnClient$lzycompute(SparkYarnApp.scala:54)
```
And then I see the exact same issue that @akitanaka describes, i.e. the Livy
session remains in `starting` state.
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