Open Radar

 
I am running my Unit Tests on my Teamcity Build Agent which is running as a Launch Daemon.
 
My problem is that sometimes the tests are running successfully, but sometimes I run into a hanging state in the middle of running the tests.
Everything is working fine when I run my tests locally.
 
I already tried to create a fresh simulator instance for running my tests but that did not solve the issue.
 
Here is the relevant snippet of my build script :
        #Force close the Simulator  
        killall "Simulator"  
        local SIMULATOR_DESTINATION_UUID=$($XCODEPATH/usr/bin/xcrun simctl create "iPhone 6" com.apple.CoreSimulator.SimDeviceType.iPhone-6 com.apple.CoreSimulator.SimRuntime.iOS-9-2)  
        LOG_FILE_AUTOMATED_TESTS="$TEAMCITY_BUILD_CHECKOUTDIR/xcodebuildAutomatedTests.log"  
        touch "$LOG_FILE_AUTOMATED_TESTS"  
        $XCODEPATH/usr/bin/xcodebuild $CLEANBUILD test -destination platform="iOS Simulator,id=$SIMULATOR_DESTINATION_UUID" -project "$TEAMCITY_BUILD_CHECKOUTDIR/$SCHEME.xcodeproj" -scheme $SCHEME -configuration "$BUILD_CONFIG_NAME_CAPITAL" -derivedDataPath "$DERIVED_DATA_DIR_DEVICE" OTHER_CODE_SIGN_FLAGS="--keychain $HOME/Library/Keychains/login.keychain" -parallelizeTargets -jobs `sysctl hw.ncpu | awk '{print 2*$2}'`  2>&1 | tee "$LOG_FILE_AUTOMATED_TESTS" | xcpretty --report junit --output automated-test-results/TEST-UnitTests-$BUILD_CONFIG_NAME_CAPITAL.xml  
        $XCODEPATH/usr/bin/xcrun simctl shutdown $SIMULATOR_DESTINATION_UUID  
        $XCODEPATH/usr/bin/xcrun simctl delete $SIMULATOR_DESTINATION_UUID  
        killall "Simulator"  
 
Here are some example results :
Here the tests ran just fine :
[15:50:58][Step 6/38] All tests  
[15:50:58][Step 6/38] Test Suite MyAppTests.xctest started  
[15:50:58][Step 6/38] MyApp1Tests  
[15:50:58][Step 6/38]     ��� testSomething1 (0.004 seconds)  
[15:51:13][Step 6/38]     ��� testSomething2 (5.608 seconds)  
[15:51:13][Step 6/38]     ��� testSomething3 (0.006 seconds)  
[15:51:13][Step 6/38]     ��� testSomething4 (0.004 seconds)  
[15:51:13][Step 6/38] MyApp2Tests  
[15:51:13][Step 6/38]     ��� testSomethingOther1 (0.005 seconds)  
[15:51:13][Step 6/38] MyApp3Tests  
[15:51:13][Step 6/38]     ��� testSomethingOtherOther1 (0.019 seconds)  
[15:51:13][Step 6/38] MyApp4Tests  
[15:51:13][Step 6/38]     ��� testSomethingOtherOtherOther1 (0.238 seconds)  
[15:51:13][Step 6/38]     ��� testSomethingOtherOtherOther2 (0.112 seconds)  
[15:51:13][Step 6/38] MyApp5Tests  
[15:51:13][Step 6/38]     ��� testSomethingOtherOtherOtherOther1 (0.000 seconds)  
[15:51:17][Step 6/38] Selected tests  
[15:51:17][Step 6/38] Test Suite join.meTests.xctest started  
[15:51:17][Step 6/38]  
[15:51:17][Step 6/38]  
[15:51:17][Step 6/38] Executed 0 tests, with 0 failures (0 unexpected) in 0.000 (0.000) seconds  
 
Here I had a hang :
[16:15:11][Step 6/38] All tests  
[16:15:11][Step 6/38] Test Suite MyAppTests.xctest started  
[16:15:11][Step 6/38] MyApp1Tests  
[16:15:11][Step 6/38]     ��� testSomething1 (0.003 seconds)  
 
Do you know what can cause this issue? I am trying to remove the "-parallelizeTargets ..." part now.
 
 
Thanks for any help!

UPDATE : 
Removing the "-parallelizeTargets ..." part did not help... :( Same results... :(

SIDENOTE : 
I couldn't reproduce it locally on my machine yet.

Steps to Reproduce:
Run Unit Tests multiple time.

Expected Results:
"xcodebuild test ..." should not hang

Actual Results:
"xcodebuild test ..." should hangs

Version:
iOS 9.2, Xcode 7.2.1

Notes:


Configuration:
iPhone 6 simulator

Attachments: