Github user bzz commented on the issue:
https://github.com/apache/zeppelin/pull/928
### CI failure debug approach
First thing to do in order to debug such issues:
- link all raw build logs
- extact and systematize failure resaons from logs (usulaly it's last
'exited with 1' message + first exception)
- cross-check them with list of [flaky-tests in
JIRA](https://issues.apache.org/jira/browse/ZEPPELIN-862?jql=project%20%3D%20ZEPPELIN%20AND%20status%20in%20(Open%2C%20%22In%20Progress%22%2C%20Reopened)%20AND%20labels%20%3D%20flaky-test)
Usually, after all this is done and posted - it is much easier for other
people to jump in and help in the drive-by reviews.
### CI failures in this PR
1. `ZeppelinSparkClusterTest` in Zeppelin Server failing
Profiles #
[1](https://api.travis-ci.org/jobs/141222530/log.txt?deansi=true),
[2](https://api.travis-ci.org/jobs/141222531/log.txt?deansi=true),
[3](https://api.travis-ci.org/jobs/141222532/log.txt?deansi=true),
```
Failed tests:
ZeppelinSparkClusterTest.pySparkDepLoaderTest:231 expected:<FINISHED> but
was:<ERROR>
ZeppelinSparkClusterTest.pySparkAutoConvertOptionTest:152
expected:<FINISHED> but was:<ERROR>
ZeppelinSparkClusterTest.pySparkTest:127 expected:<FINISHED> but
was:<ERROR>
Tests run: 63, Failures: 3, Errors: 0, Skipped: 0
```
Profile [4](https://api.travis-ci.org/jobs/141222533/log.txt?deansi=true)
has only single test failure
```
Results :
Failed tests:
ZeppelinSparkClusterTest.pySparkTest:127 expected:<FINISHED> but
was:<ERROR>
Tests run: 40, Failures: 1, Errors: 0, Skipped: 0
```
Profile [6](https://api.travis-ci.org/jobs/141222535/log.txt?deansi=true)
have even more tests
```
Running org.apache.zeppelin.rest.ZeppelinSparkClusterTest
....
5:06:37,836 INFO org.apache.zeppelin.notebook.Paragraph:252 - run
paragraph 20160630-050637_1289828172 using spark
org.apache.zeppelin.interpreter.LazyOpenInterpreter@62b97ff1
Exception in thread "pool-1-thread-3" java.lang.IllegalAccessError: tried
to access method
com.google.common.collect.MapMaker.softValues()Lcom/google/common/collect/MapMaker;
from class org.apache.spark.SparkEnv
at org.apache.spark.SparkEnv.<init>(SparkEnv.scala:75)
at org.apache.spark.SparkEnv$.create(SparkEnv.scala:272)
at org.apache.spark.SparkContext.<init>(SparkContext.scala:204)
at
org.apache.zeppelin.spark.SparkInterpreter.createSparkContext(SparkInterpreter.java:338)
at
org.apache.zeppelin.spark.SparkInterpreter.getSparkContext(SparkInterpreter.java:122)
at
org.apache.zeppelin.spark.SparkInterpreter.open(SparkInterpreter.java:513)
at
org.apache.zeppelin.interpreter.LazyOpenInterpreter.open(LazyOpenInterpreter.java:69)
at
org.apache.zeppelin.interpreter.LazyOpenInterpreter.getProgress(LazyOpenInterpreter.java:110)
at
org.apache.zeppelin.interpreter.remote.RemoteInterpreterServer.getProgress(RemoteInterpreterServer.java:404)
at
org.apache.zeppelin.interpreter.thrift.RemoteInterpreterService$Processor$getProgress.getResult(RemoteInterpreterService.java:1509)
at
org.apache.zeppelin.interpreter.thrift.RemoteInterpreterService$Processor$getProgress.getResult(RemoteInterpreterService.java:1494)
at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
at
org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:285)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
.....
Failed tests:
ZeppelinSparkClusterTest.pySparkDepLoaderTest:195->getSparkVersionNumber:250
expected:<FINISHED> but was:<ERROR>
ZeppelinSparkClusterTest.pySparkAutoConvertOptionTest:139->getSparkVersionNumber:250
expected:<FINISHED> but was:<ERROR>
ZeppelinSparkClusterTest.basicRDDTransformationAndActionTest:81
expected:<FINISHED> but was:<ERROR>
ZeppelinSparkClusterTest.pySparkTest:115->getSparkVersionNumber:250
expected:<FINISHED> but was:<ERROR>
ZeppelinSparkClusterTest.zRunTest:180 expected:<FINISHED> but was:<ERROR>
ZeppelinSparkClusterTest.sparkRTest:90->getSparkVersionNumber:250
expected:<FINISHED> but was:<ERROR>
```
1. `ZeppelinSparkClusterTest` hangs AKA
[ZEPPELIN-862](https://issues.apache.org/jira/browse/ZEPPELIN-862)
Profile [5](https://api.travis-ci.org/jobs/141222534/log.txt?deansi=true)
```
Running org.apache.zeppelin.rest.ZeppelinSparkClusterTest
...
No output has been received in the last 10 minutes, this potentially
indicates a stalled build or something wrong with the build itself.
The build has been terminated
```
This guys is known and flaky, so it's better to focus on the rest issues
for now.
1. `SparkParagraphIT.testPySpark` failure - never seen before, might
deserve a separate JIRA issue with `flaky-test` label.
Profile [7](https://api.travis-ci.org/jobs/141222536/log.txt?deansi=true)
fails in somehow a new way
```
Results :
Failed tests:
SparkParagraphIT.testPySpark:132 Paragraph from SparkParagraphIT of
testPySpark status:
Expected: "FINISHED"
but: was "ERROR"
SparkParagraphIT.testPySpark:139 Paragraph from SparkParagraphIT of
testPySpark result:
Expected: "test loop 0\ntest loop 1\ntest loop 2"
but: was "Traceback (most recent call last):\n File
\"/tmp/zeppelin_pyspark-8754372370659284789.py\", line 20, in <module>\n
from py4j.java_gateway import java_import, JavaGateway,
GatewayClient\nImportError: No module named py4j.java_gateway\npyspark is not
responding Traceback (most recent call last):\n File
\"/tmp/zeppelin_pyspark-8754372370659284789.py\", line 20, in <module>\n
from py4j.java_gateway import java_import, JavaGateway,
GatewayClient\nImportError: No module named py4j.java_gateway"
Tests run: 16, Failures: 2, Errors: 0, Skipped: 0
```
Please feel free to add, in case I'm missing something here.
---------------------------
From the first glance `java.lang.IllegalAccessError: tried to access
method` - means that there is different version of some class in run-time, from
the one you expect\have in compile time.
This happens a lot when transitive dependencies bring new versions of the
library you already have.
I would start looking at Guava dependency version that you have in `mvn
dependency:tree` to determine the "offender".
Hope this helps @rawkintrevo !
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