Disabling parallelExecution has worked for me.
Other alternatives I’ve tried that also work include:
1. Using a lock – this will let tests execute in parallel except for those
using a SparkContext. If you have a large number of tests that could execute
in parallel, this can shave off some time.
object TestingSparkContext {
val lock = new Lock()
}
// before you instantiate your local SparkContext
TestingSparkContext.lock.acquire()
// after you call sc.stop()
TestingSparkContext.lock.release()
2. Sharing a local SparkContext between tests.
- This is nice because your tests will run faster. Start-up and shutdown is
time consuming (can add a few seconds per test).
- The downside is that your tests are using the same SparkContext so they are
less independent of each other. I haven’t seen issues with this yet but there
are likely some things that might crop up.
Best,
Todd
From: Anselme Vignon [mailto:anselme.vig...@flaminem.com]
Sent: Wednesday, June 18, 2014 12:33 AM
To: user@spark.apache.org
Subject: Re: Unit test failure: Address already in use
Hi,
Could your problem come from the fact that you run your tests in parallel ?
If you are spark in local mode, you cannot have concurrent spark instances
running. this means that your tests instantiating sparkContext cannot be run in
parallel. The easiest fix is to tell sbt to not run parallel tests.
This can be done by adding the following line in your build.sbt:
parallelExecution in Test := false
Cheers,
Anselme
2014-06-17 23:01 GMT+02:00 SK
<skrishna...@gmail.com<mailto:skrishna...@gmail.com>>:
Hi,
I have 3 unit tests (independent of each other) in the /src/test/scala
folder. When I run each of them individually using: sbt "test-only <test>",
all the 3 pass the test. But when I run them all using "sbt test", then they
fail with the warning below. I am wondering if the binding exception results
in failure to run the job, thereby causing the failure. If so, what can I do
to address this binding exception? I am running these tests locally on a
standalone machine (i.e. SparkContext("local", "test")).
14/06/17 13:42:48 WARN component.AbstractLifeCycle: FAILED
org.eclipse.jetty.server.Server@3487b78d<mailto:org.eclipse.jetty.server.Server@3487b78d>:
java.net.BindException: Address
already in use
java.net.BindException: Address already in use
at sun.nio.ch.Net.bind0(Native Method)
at sun.nio.ch.Net.bind(Net.java:174)
at
sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:139)
at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:77)
thanks
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