See 
<https://builds.apache.org/job/beam_PostCommit_Java_MavenInstall_Windows/159/display/redirect?page=changes>

Changes:

[kirpichov] BEAM-1438 Auto shard streaming sinks

[robertwb] None should be a valid return element

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2017-06-21T06:33:18.225 [INFO] Skipping Apache Beam :: Parent
2017-06-21T06:33:18.225 [INFO] This project has been banned from the build due 
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2017-06-21T06:33:18.225 [INFO] 
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2017-06-21T06:34:16.705 [INFO] 
------------------------------------------------------------------------
2017-06-21T06:34:16.705 [INFO] Reactor Summary:
2017-06-21T06:34:16.705 [INFO] 
2017-06-21T06:34:16.706 [INFO] Apache Beam :: Parent 
.............................. SUCCESS [ 25.756 s]
2017-06-21T06:34:16.706 [INFO] Apache Beam :: SDKs :: Java :: Build Tools 
......... SUCCESS [ 18.657 s]
2017-06-21T06:34:16.706 [INFO] Apache Beam :: SDKs 
................................ SUCCESS [  8.728 s]
2017-06-21T06:34:16.706 [INFO] Apache Beam :: SDKs :: Common 
...................... SUCCESS [  5.539 s]
2017-06-21T06:34:16.706 [INFO] Apache Beam :: SDKs :: Common :: Runner API 
........ SUCCESS [ 23.187 s]
2017-06-21T06:34:16.706 [INFO] Apache Beam :: SDKs :: Common :: Fn API 
............ SUCCESS [ 23.223 s]
2017-06-21T06:34:16.706 [INFO] Apache Beam :: SDKs :: Java 
........................ SUCCESS [  5.969 s]
2017-06-21T06:34:16.706 [INFO] Apache Beam :: SDKs :: Java :: Core 
................ SUCCESS [04:13 min]
2017-06-21T06:34:16.706 [INFO] Apache Beam :: Runners 
............................. SUCCESS [  5.393 s]
2017-06-21T06:34:16.706 [INFO] Apache Beam :: Runners :: Core Construction Java 
... SUCCESS [ 48.687 s]
2017-06-21T06:34:16.706 [INFO] Apache Beam :: Runners :: Core Java 
................ SUCCESS [01:10 min]
2017-06-21T06:34:16.706 [INFO] Apache Beam :: Runners :: Direct Java 
.............. SUCCESS [03:41 min]
2017-06-21T06:34:16.706 [INFO] Apache Beam :: SDKs :: Java :: IO 
.................. SUCCESS [  5.577 s]
2017-06-21T06:34:16.706 [INFO] Apache Beam :: SDKs :: Java :: IO :: Common 
........ SUCCESS [ 10.291 s]
2017-06-21T06:34:16.706 [INFO] Apache Beam :: SDKs :: Java :: IO :: Cassandra 
..... SUCCESS [ 37.560 s]
2017-06-21T06:34:16.706 [INFO] Apache Beam :: SDKs :: Java :: IO :: 
Elasticsearch . SUCCESS [ 53.042 s]
2017-06-21T06:34:16.707 [INFO] Apache Beam :: SDKs :: Java :: Extensions 
.......... SUCCESS [  5.335 s]
2017-06-21T06:34:16.707 [INFO] Apache Beam :: SDKs :: Java :: Extensions :: 
Google Cloud Platform Core SUCCESS [ 54.601 s]
2017-06-21T06:34:16.707 [INFO] Apache Beam :: SDKs :: Java :: Extensions :: 
Protobuf SUCCESS [ 29.446 s]
2017-06-21T06:34:16.707 [INFO] Apache Beam :: SDKs :: Java :: IO :: Google 
Cloud Platform SUCCESS [01:33 min]
2017-06-21T06:34:16.707 [INFO] Apache Beam :: SDKs :: Java :: IO :: Hadoop 
Common . SUCCESS [ 29.722 s]
2017-06-21T06:34:16.707 [INFO] Apache Beam :: SDKs :: Java :: IO :: Hadoop File 
System SUCCESS [ 40.757 s]
2017-06-21T06:34:16.707 [INFO] Apache Beam :: SDKs :: Java :: IO :: Hadoop 
........ SUCCESS [  8.565 s]
2017-06-21T06:34:16.707 [INFO] Apache Beam :: SDKs :: Java :: IO :: Hadoop :: 
input-format SUCCESS [ 32.297 s]
2017-06-21T06:34:16.707 [INFO] Apache Beam :: SDKs :: Java :: IO :: Hadoop :: 
jdk1.8-tests SUCCESS [01:49 min]
2017-06-21T06:34:16.707 [INFO] Apache Beam :: SDKs :: Java :: IO :: HBase 
......... SUCCESS [ 45.245 s]
2017-06-21T06:34:16.707 [INFO] Apache Beam :: SDKs :: Java :: IO :: HCatalog 
...... SUCCESS [01:06 min]
2017-06-21T06:34:16.707 [INFO] Apache Beam :: SDKs :: Java :: IO :: JDBC 
.......... SUCCESS [ 35.992 s]
2017-06-21T06:34:16.707 [INFO] Apache Beam :: SDKs :: Java :: IO :: JMS 
........... SUCCESS [ 32.720 s]
2017-06-21T06:34:16.707 [INFO] Apache Beam :: SDKs :: Java :: IO :: Kafka 
......... SUCCESS [ 42.254 s]
2017-06-21T06:34:16.707 [INFO] Apache Beam :: SDKs :: Java :: IO :: Kinesis 
....... SUCCESS [ 35.640 s]
2017-06-21T06:34:16.707 [INFO] Apache Beam :: SDKs :: Java :: IO :: MongoDB 
....... SUCCESS [ 50.539 s]
2017-06-21T06:34:16.707 [INFO] Apache Beam :: SDKs :: Java :: IO :: MQTT 
.......... SUCCESS [ 32.261 s]
2017-06-21T06:34:16.707 [INFO] Apache Beam :: SDKs :: Java :: IO :: XML 
........... SUCCESS [ 29.269 s]
2017-06-21T06:34:16.707 [INFO] Apache Beam :: SDKs :: Java :: Maven Archetypes 
.... SUCCESS [  4.473 s]
2017-06-21T06:34:16.707 [INFO] Apache Beam :: SDKs :: Java :: Maven Archetypes 
:: Starter SUCCESS [ 27.016 s]
2017-06-21T06:34:16.707 [INFO] Apache Beam :: SDKs :: Java :: Extensions :: 
Jackson SUCCESS [ 26.564 s]
2017-06-21T06:34:16.708 [INFO] Apache Beam :: SDKs :: Java :: Extensions :: 
Join library SUCCESS [ 29.329 s]
2017-06-21T06:34:16.708 [INFO] Apache Beam :: SDKs :: Java :: Extensions :: 
Sorter  SUCCESS [ 35.650 s]
2017-06-21T06:34:16.708 [INFO] Apache Beam :: Runners :: Google Cloud Dataflow 
.... SUCCESS [ 51.316 s]
2017-06-21T06:34:16.708 [INFO] Apache Beam :: SDKs :: Java :: Harness 
............. SUCCESS [ 56.573 s]
2017-06-21T06:34:16.708 [INFO] Apache Beam :: SDKs :: Java :: Java 8 Tests 
........ SUCCESS [ 23.461 s]
2017-06-21T06:34:16.708 [INFO] Apache Beam :: SDKs :: Python 
...................... FAILURE [  4.476 s]
2017-06-21T06:34:16.708 [INFO] Apache Beam :: Runners :: Flink 
.................... SKIPPED
2017-06-21T06:34:16.708 [INFO] Apache Beam :: Runners :: Spark 
.................... SKIPPED
2017-06-21T06:34:16.708 [INFO] Apache Beam :: Runners :: Apex 
..................... SKIPPED
2017-06-21T06:34:16.708 [INFO] Apache Beam :: Examples 
............................ SKIPPED
2017-06-21T06:34:16.708 [INFO] Apache Beam :: Examples :: Java 
.................... SKIPPED
2017-06-21T06:34:16.708 [INFO] Apache Beam :: Examples :: Java 8 
.................. SKIPPED
2017-06-21T06:34:16.708 [INFO] Apache Beam :: SDKs :: Java :: Aggregated 
Javadoc .. SKIPPED
2017-06-21T06:34:16.708 [INFO] 
------------------------------------------------------------------------
2017-06-21T06:34:16.708 [INFO] BUILD FAILURE
2017-06-21T06:34:16.708 [INFO] 
------------------------------------------------------------------------
2017-06-21T06:34:16.708 [INFO] Total time: 33:37 min
2017-06-21T06:34:16.709 [INFO] Finished at: 2017-06-21T06:34:16+00:00
2017-06-21T06:34:18.106 [INFO] Final Memory: 323M/2904M
2017-06-21T06:34:18.107 [INFO] 
------------------------------------------------------------------------
Waiting for Jenkins to finish collecting data
2017-06-21T06:34:19.033 [ERROR] Failed to execute goal 
org.codehaus.gmaven:groovy-maven-plugin:2.0:execute 
(find-supported-python-for-clean) on project beam-sdks-python: Unable to find 
Python 2.7 in path -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal 
org.codehaus.gmaven:groovy-maven-plugin:2.0:execute 
(find-supported-python-for-clean) on project beam-sdks-python: Unable to find 
Python 2.7 in path
        at 
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:212)
        at 
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
        at 
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
        at 
org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
        at 
org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
        at 
org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
        at 
org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
        at 
org.jvnet.hudson.maven3.launcher.Maven33Launcher.main(Maven33Launcher.java:129)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.codehaus.plexus.classworlds.launcher.Launcher.launchStandard(Launcher.java:330)
        at 
org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:238)
        at jenkins.maven3.agent.Maven33Main.launch(Maven33Main.java:176)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at hudson.maven.Maven3Builder.call(Maven3Builder.java:139)
        at hudson.maven.Maven3Builder.call(Maven3Builder.java:70)
        at hudson.remoting.UserRequest.perform(UserRequest.java:120)
        at hudson.remoting.UserRequest.perform(UserRequest.java:48)
        at hudson.remoting.Request$2.run(Request.java:326)
        at 
hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:68)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.maven.plugin.MojoFailureException: Unable to find Python 
2.7 in path
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at 
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at 
org.codehaus.groovy.reflection.CachedConstructor.invoke(CachedConstructor.java:77)
        at 
org.codehaus.groovy.runtime.callsite.ConstructorSite$ConstructorSiteNoUnwrapNoCoerce.callConstructor(ConstructorSite.java:102)
        at 
org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallConstructor(CallSiteArray.java:57)
        at 
org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:182)
        at 
org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:190)
        at findSupportedPython.run(findSupportedPython.groovy:70)
        at groovy.lang.GroovyShell.evaluate(GroovyShell.java:518)
        at 
org.codehaus.gmaven.adapter.impl.ScriptExecutorImpl.execute(ScriptExecutorImpl.java:80)
        at org.codehaus.gmaven.plugin.ExecuteMojo$1.run(ExecuteMojo.java:100)
        at 
org.codehaus.gmaven.plugin.util.SystemNoExitGuard.run(SystemNoExitGuard.java:45)
        at org.codehaus.gmaven.plugin.ExecuteMojo.run(ExecuteMojo.java:96)
        at org.codehaus.gmaven.plugin.MojoSupport.execute(MojoSupport.java:45)
        at 
org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
        at 
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
        ... 31 more
2017-06-21T06:34:19.036 [ERROR] 
2017-06-21T06:34:19.036 [ERROR] Re-run Maven using the -X switch to enable full 
debug logging.
2017-06-21T06:34:19.036 [ERROR] 
2017-06-21T06:34:19.036 [ERROR] For more information about the errors and 
possible solutions, please read the following articles:
2017-06-21T06:34:19.036 [ERROR] [Help 1] 
http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
2017-06-21T06:34:19.037 [ERROR] 
2017-06-21T06:34:19.037 [ERROR] After correcting the problems, you can resume 
the build with the command
2017-06-21T06:34:19.037 [ERROR]   mvn <goals> -rf :beam-sdks-python
channel stopped
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