See 
<https://builds.apache.org/job/beam_PostCommit_Java_MavenInstall/2774/display/redirect?page=changes>

Changes:

[tgroh] Correct Apex translation of Single-input Flatten

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2017-02-28T18:02:41.590 [INFO] Reactor Summary:
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2017-02-28T18:02:41.591 [INFO] Apache Beam :: SDKs :: Java :: IO :: Kafka 
......... SUCCESS [ 18.146 s]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: SDKs :: Java :: IO :: Kinesis 
....... SUCCESS [ 17.841 s]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: SDKs :: Java :: IO :: MongoDB 
....... SUCCESS [ 30.363 s]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: SDKs :: Java :: IO :: MQTT 
.......... SUCCESS [ 17.918 s]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: SDKs :: Java :: Maven Archetypes 
.... SUCCESS [  1.393 s]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: SDKs :: Java :: Maven Archetypes 
:: Starter SUCCESS [ 13.810 s]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: SDKs :: Java :: Maven Archetypes 
:: Examples SUCCESS [ 16.666 s]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: SDKs :: Java :: Maven Archetypes 
:: Examples - Java 8 SUCCESS [ 23.694 s]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: SDKs :: Java :: Extensions 
.......... SUCCESS [  1.347 s]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: SDKs :: Java :: Extensions :: 
Jackson SUCCESS [ 16.150 s]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: SDKs :: Java :: Extensions :: 
Join library SUCCESS [ 17.541 s]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: SDKs :: Java :: Extensions :: 
Sorter  SUCCESS [ 44.275 s]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: SDKs :: Java :: Harness 
............. SUCCESS [ 36.120 s]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: SDKs :: Java :: Java 8 Tests 
........ SUCCESS [ 14.481 s]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: SDKs :: Python 
...................... SUCCESS [03:48 min]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: Runners :: Flink 
.................... SUCCESS [  1.664 s]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: Runners :: Flink :: Core 
............ SUCCESS [ 52.611 s]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: Runners :: Flink :: Examples 
........ SUCCESS [ 16.424 s]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: Runners :: Spark 
.................... SUCCESS [03:58 min]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: Runners :: Apex 
..................... SUCCESS [01:01 min]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: Examples 
............................ SUCCESS [  1.998 s]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: Examples :: Java 
.................... SUCCESS [06:06 min]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: Examples :: Java 8 
.................. SUCCESS [ 24.892 s]
2017-02-28T18:02:41.591 [INFO] Apache Beam :: SDKs :: Java :: Aggregated 
Javadoc .. SUCCESS [ 23.376 s]
2017-02-28T18:02:41.591 [INFO] 
------------------------------------------------------------------------
2017-02-28T18:02:41.591 [INFO] BUILD FAILURE
2017-02-28T18:02:41.591 [INFO] 
------------------------------------------------------------------------
2017-02-28T18:02:41.591 [INFO] Total time: 40:22 min
2017-02-28T18:02:41.592 [INFO] Finished at: 2017-02-28T18:02:41+00:00
2017-02-28T18:02:42.924 [INFO] Final Memory: 272M/1519M
2017-02-28T18:02:42.924 [INFO] 
------------------------------------------------------------------------
Waiting for Jenkins to finish collecting data
2017-02-28T18:03:27.231 [ERROR] Failed to execute goal 
org.eluder.coveralls:coveralls-maven-plugin:4.3.0:report (default-cli) on 
project beam-parent: I/O operation failed: Report submission to Coveralls API 
failed with HTTP status 504: Gateway Time-out (Coveralls API internal error) -> 
[Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal 
org.eluder.coveralls:coveralls-maven-plugin:4.3.0:report (default-cli) on 
project beam-parent: I/O operation failed
        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:153)
        at hudson.remoting.UserRequest.perform(UserRequest.java:50)
        at hudson.remoting.Request$2.run(Request.java:336)
        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: I/O operation failed
        at 
org.eluder.coveralls.maven.plugin.CoverallsReportMojo.execute(CoverallsReportMojo.java:259)
        at 
org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
        at 
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
        ... 31 more
Caused by: java.io.IOException: Report submission to Coveralls API failed with 
HTTP status 504: Gateway Time-out (Coveralls API internal error)
        at 
org.eluder.coveralls.maven.plugin.httpclient.CoverallsClient.parseResponse(CoverallsClient.java:108)
        at 
org.eluder.coveralls.maven.plugin.httpclient.CoverallsClient.submit(CoverallsClient.java:85)
        at 
org.eluder.coveralls.maven.plugin.CoverallsReportMojo.submitData(CoverallsReportMojo.java:400)
        at 
org.eluder.coveralls.maven.plugin.CoverallsReportMojo.execute(CoverallsReportMojo.java:254)
        ... 33 more
Caused by: java.io.IOException: Coveralls API internal error
        at 
org.eluder.coveralls.maven.plugin.httpclient.CoverallsClient.parseResponse(CoverallsClient.java:97)
        ... 36 more
2017-02-28T18:03:27.233 [ERROR] 
2017-02-28T18:03:27.233 [ERROR] Re-run Maven using the -X switch to enable full 
debug logging.
2017-02-28T18:03:27.233 [ERROR] 
2017-02-28T18:03:27.233 [ERROR] For more information about the errors and 
possible solutions, please read the following articles:
2017-02-28T18:03:27.233 [ERROR] [Help 1] 
http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
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