onedigit edited a comment on pull request #170:
URL: https://github.com/apache/incubator-livy/pull/170#issuecomment-703122226
This problem persists in the current master.
```
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.
Even if, `jersey-core-1.19.jar` is added, the problem won't be solved, since
that jar no longer includes the missing class. That is
```
jar tvf jersey-core-1.19.jar | grep javax.ws.rs.ext.MessageBodyReader
1763 Thu Nov 21 07:17:18 UTC 2013
META-INF/services/javax.ws.rs.ext.MessageBodyReader
```
However, If we look inside the `jersey-core-1.9.jar`, we see that the
missing class is there:
```
jar tvf jersey-core-1.9.jar | grep javax.ws.rs.ext.MessageBodyReader
1763 Fri Sep 02 11:16:04 UTC 2011
META-INF/services/javax.ws.rs.ext.MessageBodyReader
950 Fri Sep 02 11:16:40 UTC 2011 javax/ws/rs/ext/MessageBodyReader.class
```
In order to keep `jersey-core-1.19.jar` that's required by the thriftserver
and get Livy server working, we need to add the right version of `jsr311-api`
jar. For example, Hadoop 3.3.0 now includes `jsr311-api-1.1.1.jar`. This is
the jar that now contains the required class:
```
jar tvf jsr311-api-1.1.1.jar | grep javax.ws.rs.ext.MessageBodyReader
950 Mon Nov 09 13:45:50 UTC 2009 javax/ws/rs/ext/MessageBodyReader.class
```
If I manually add this jar to the class path of the Livy server, then it
works as expected.
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