Github user sjcorbett commented on the issue:
https://github.com/apache/brooklyn-server/pull/409
I also have integration test failures on this branch:
```
SshjToolIntegrationTest.testAsyncExecAbortsIfProcessFails:273 expected
[false] but found [true]
SshjToolIntegrationTest.testAsyncExecTimesOut:234 exec took 301 seconds
expected [true] but found [false]
```
In both cases the behaviour actually being tested works as expected but it
fails to clean up temporary files afterwards, blocking on this line of
`SshjTool`:
```
int execDeleteResult = asInt(acquire(new
ShellAction(deleteTemporaryFilesCommand(), out, err, pollTimeout)), -1)
```
The tests block waiting for the channel to close:
```
"main" #1 prio=5 os_prio=31 tid=0x00007fd9fc800000 nid=0x1703 waiting on
condition [0x0000700000217000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00000007b9ff5468> (a
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2163)
at net.schmizz.concurrent.Promise.tryRetrieve(Promise.java:170)
at net.schmizz.concurrent.Promise.retrieve(Promise.java:137)
at net.schmizz.concurrent.Event.await(Event.java:103)
at
net.schmizz.sshj.connection.channel.AbstractChannel.join(AbstractChannel.java:259)
at
org.apache.brooklyn.util.core.internal.ssh.sshj.SshjTool$ShellAction.create(SshjTool.java:1007)
at
org.apache.brooklyn.util.core.internal.ssh.sshj.SshjTool$ShellAction.create(SshjTool.java:924)
at
org.apache.brooklyn.util.core.internal.ssh.sshj.SshjTool.acquire(SshjTool.java:625)
at
org.apache.brooklyn.util.core.internal.ssh.sshj.SshjTool.acquire(SshjTool.java:611)
at
org.apache.brooklyn.util.core.internal.ssh.sshj.SshjTool$2.run(SshjTool.java:433)
at
org.apache.brooklyn.util.core.internal.ssh.sshj.SshjTool.execScriptAsyncAndPoll(SshjTool.java:544)
at
org.apache.brooklyn.util.core.internal.ssh.sshj.SshjTool.execScript(SshjTool.java:316)
at
org.apache.brooklyn.util.core.internal.ssh.sshj.SshjToolIntegrationTest.testAsyncExecTimesOut(SshjToolIntegrationTest.java:221)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
```
If you enable sshj's debug log you'll see lots of messages like:
```
DEBUG net.schmizz.concurrent.Promise [main]: Awaiting <<chan#4 / close>>
```
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