# Running Java API tests **URL:** \ **Category:** Ray Core\ **Created:** [January 22, 2021, 8:36pm UTC](https://discuss.ray.io/t/running-java-api-tests/549 "2021-01-22T20:36:24Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![doru1004](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/doru1004/32/291_2.png) [@doru1004](https://discuss.ray.io/u/doru1004)\ **Post date:** [January 22, 2021, 8:36pm UTC](https://discuss.ray.io/t/running-java-api-tests/549/1 "2021-01-22T20:36:24Z")
I managed to install Ray from source. After doing the pip install step outlined in the documentation I wanted to build the Java part of the project. In `ray/java` directory I ran: ```auto mvn compile mvn package ``` The first 3 steps complete successfully, the 4th step (running the tests) fails with: ```auto DefaultRayRuntimeFactory [main]: Failed to initialize ray runtime, with config {...} ``` Any thoughts whether I’m missing some setup steps or what the cause of the error is? ---
**Author:** ![ffbin](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/ffbin/32/296_2.png) [@ffbin](https://discuss.ray.io/u/ffbin)\ **Post date:** [January 23, 2021, 5:55am UTC](https://discuss.ray.io/t/running-java-api-tests/549/2 "2021-01-23T05:55:00Z")
Hey @doru1004 , how do you run Java test cases? Now running java examples depends on python. My general steps are as follows: 1 ./ build.sh -l java 2 cd java 3 mvn clean install -DskipTests - Dcheckstyle.skip=true 4 cd …/python 5 pip install -e . -v 6 cd …/java 7 mvn test -pl test -Dtest=“KillActorTest” - Dcheckstyle.skip ---
**Author:** ![kfstorm](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/kfstorm/32/310_2.png) [@kfstorm](https://discuss.ray.io/u/kfstorm)\ **Post date:** [January 23, 2021, 8:00am UTC](https://discuss.ray.io/t/running-java-api-tests/549/3 "2021-01-23T08:00:30Z")
Could you give more details about the error? We should be able to see the full exception stack. ---
**Author:** ![doru1004](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/doru1004/32/291_2.png) [@doru1004](https://discuss.ray.io/u/doru1004)\ **Post date:** [January 25, 2021, 4:17pm UTC](https://discuss.ray.io/t/running-java-api-tests/549/4 "2021-01-25T16:17:58Z")
Thanks for your reply @ffbin, after running this chain of commands you mentioned I seem to get no tests found when running step 7: ```auto [INFO] Results: [INFO] [INFO] Tests run: 0, Failures: 0, Errors: 0, Skipped: 0 ``` ---
**Author:** ![doru1004](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/doru1004/32/291_2.png) [@doru1004](https://discuss.ray.io/u/doru1004)\ **Post date:** [January 25, 2021, 4:18pm UTC](https://discuss.ray.io/t/running-java-api-tests/549/5 "2021-01-25T16:18:41Z")
When I run mvn package I get this when trying to run one of the tests: ```auto java.lang.RuntimeException: Failed to start Ray runtime. at io.ray.runtime.runner.RunManager.startRayHead(RunManager.java:41) at io.ray.runtime.RayNativeRuntime.start(RayNativeRuntime.java:75) at io.ray.runtime.DefaultRayRuntimeFactory.createRayRuntime(DefaultRayRuntimeFactory.java:39) at io.ray.api.Ray.init(Ray.java:38) at io.ray.api.Ray.init(Ray.java:25) at io.ray.test.BaseTest.setUpBase(BaseTest.java:14) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:567) at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:132) at org.testng.internal.MethodInvocationHelper.invokeMethodConsideringTimeout(MethodInvocationHelper.java:61) at org.testng.internal.ConfigInvoker.invokeConfigurationMethod(ConfigInvoker.java:366) at org.testng.internal.ConfigInvoker.invokeConfigurations(ConfigInvoker.java:320) at org.testng.internal.TestInvoker.runConfigMethods(TestInvoker.java:701) at org.testng.internal.TestInvoker.invokeMethod(TestInvoker.java:527) at org.testng.internal.TestInvoker.invokeTestMethod(TestInvoker.java:174) at org.testng.internal.MethodRunner.runInSequence(MethodRunner.java:46) at org.testng.internal.TestInvoker$MethodInvocationAgent.invoke(TestInvoker.java:822) at org.testng.internal.TestInvoker.invokeTestMethods(TestInvoker.java:147) at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:146) at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:128) at java.base/java.util.ArrayList.forEach(ArrayList.java:1507) at org.testng.TestRunner.privateRun(TestRunner.java:764) at org.testng.TestRunner.run(TestRunner.java:585) at org.testng.SuiteRunner.runTest(SuiteRunner.java:384) at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:378) at org.testng.SuiteRunner.privateRun(SuiteRunner.java:337) at org.testng.SuiteRunner.run(SuiteRunner.java:286) at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:53) at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:96) at org.testng.TestNG.runSuitesSequentially(TestNG.java:1218) at org.testng.TestNG.runSuitesLocally(TestNG.java:1140) at org.testng.TestNG.runSuites(TestNG.java:1069) at org.testng.TestNG.run(TestNG.java:1037) at org.apache.maven.surefire.testng.TestNGExecutor.run(TestNGExecutor.java:283) at org.apache.maven.surefire.testng.TestNGXmlTestSuite.execute(TestNGXmlTestSuite.java:75) at org.apache.maven.surefire.testng.TestNGProvider.invoke(TestNGProvider.java:120) at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:379) at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:340) at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:125) at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:413) Caused by: java.lang.RuntimeException: The exit value of the process is 1. Command: ray start --head --redis-password 5241570000000000 --system-config={"put_small_object_in_memory_store":false} output: 2021-01-25 11:17:33,370 INFO scripts.py:537 -- Local node IP: 192.168.1.187 RuntimeError: Couldn't start Redis. Check log files: /tmp/ray/session_2021-01-25_11-17-33_401571_33222/logs/redis.out /tmp/ray/session_2021-01-25_11-17-33_401571_33222/logs/redis.err at io.ray.runtime.runner.RunManager.runCommand(RunManager.java:117) at io.ray.runtime.runner.RunManager.startRayHead(RunManager.java:39) ... 41 more ``` ---
**Author:** ![doru1004](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/doru1004/32/291_2.png) [@doru1004](https://discuss.ray.io/u/doru1004)\ **Post date:** [January 25, 2021, 5:17pm UTC](https://discuss.ray.io/t/running-java-api-tests/549/6 "2021-01-25T17:17:09Z")
Is the python executable invoked directly when Java API is in use? If so, is there a way to overwrite it or point to a specific python executable? I believe it is picking the wrong one. ---
**Author:** ![doru1004](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/doru1004/32/291_2.png) [@doru1004](https://discuss.ray.io/u/doru1004)\ **Post date:** [January 25, 2021, 5:20pm UTC](https://discuss.ray.io/t/running-java-api-tests/549/7 "2021-01-25T17:20:50Z")
After running: ```auto ray start --head --redis-password ... ``` Ray runtime started then I stopped it using: ```auto ray stop ``` This signaled that one of the ray processes was still running which is the one responsible for the error above I think. After doing: ```auto ray stop --force ``` the process was killed and I was able to run a bit further than before I think: Now I am getting this error: ```auto java.lang.RuntimeException: Failed to get address info. Output: null at io.ray.runtime.runner.RunManager.getAddressInfoAndFillConfig(RunManager.java:90) at io.ray.runtime.RayNativeRuntime.start(RayNativeRuntime.java:88) at io.ray.runtime.DefaultRayRuntimeFactory.createRayRuntime(DefaultRayRuntimeFactory.java:39) at io.ray.api.Ray.init(Ray.java:38) at io.ray.api.Ray.init(Ray.java:25) at io.ray.test.BaseTest.setUpBase(BaseTest.java:14) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:567) at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:132) at org.testng.internal.MethodInvocationHelper.invokeMethodConsideringTimeout(MethodInvocationHelper.java:61) at org.testng.internal.ConfigInvoker.invokeConfigurationMethod(ConfigInvoker.java:366) at org.testng.internal.ConfigInvoker.invokeConfigurations(ConfigInvoker.java:320) at org.testng.internal.TestInvoker.runConfigMethods(TestInvoker.java:701) at org.testng.internal.TestInvoker.invokeMethod(TestInvoker.java:527) at org.testng.internal.TestInvoker.invokeTestMethod(TestInvoker.java:174) at org.testng.internal.MethodRunner.runInSequence(MethodRunner.java:46) at org.testng.internal.TestInvoker$MethodInvocationAgent.invoke(TestInvoker.java:822) at org.testng.internal.TestInvoker.invokeTestMethods(TestInvoker.java:147) at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:146) at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:128) at java.base/java.util.ArrayList.forEach(ArrayList.java:1507) at org.testng.TestRunner.privateRun(TestRunner.java:764) at org.testng.TestRunner.run(TestRunner.java:585) at org.testng.SuiteRunner.runTest(SuiteRunner.java:384) at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:378) at org.testng.SuiteRunner.privateRun(SuiteRunner.java:337) at org.testng.SuiteRunner.run(SuiteRunner.java:286) at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:53) at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:96) at org.testng.TestNG.runSuitesSequentially(TestNG.java:1218) at org.testng.TestNG.runSuitesLocally(TestNG.java:1140) at org.testng.TestNG.runSuites(TestNG.java:1069) at org.testng.TestNG.run(TestNG.java:1037) at org.apache.maven.surefire.testng.TestNGExecutor.run(TestNGExecutor.java:283) at org.apache.maven.surefire.testng.TestNGXmlTestSuite.execute(TestNGXmlTestSuite.java:75) at org.apache.maven.surefire.testng.TestNGProvider.invoke(TestNGProvider.java:120) at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:379) at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:340) at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:125) at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:413) ``` Caused by: ```auto Caused by: java.lang.RuntimeException: The exit value of the process is 1. Command: python -c import ray; ...) output: Traceback (most recent call last): File "", line 1, in ImportError: No module named ray ``` This is because the wrong version of python is used. ---
**Author:** ![doru1004](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/doru1004/32/291_2.png) [@doru1004](https://discuss.ray.io/u/doru1004)\ **Post date:** [January 25, 2021, 5:53pm UTC](https://discuss.ray.io/t/running-java-api-tests/549/8 "2021-01-25T17:53:43Z")
Looks like the call to python is hardcoded and cannot be customized. Pointing manually to the correct python enabled the test to start running. ---
**Author:** ![ffbin](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/ffbin/32/296_2.png) [@ffbin](https://discuss.ray.io/u/ffbin)\ **Post date:** [January 26, 2021, 2:03am UTC](https://discuss.ray.io/t/running-java-api-tests/549/9 "2021-01-26T02:03:31Z")
@kfstorm Can we add a document describing how to run Java use cases? ---
**Author:** ![raulchen](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/raulchen/32/330_2.png) [@raulchen](https://discuss.ray.io/u/raulchen)\ **Post date:** [January 26, 2021, 3:14am UTC](https://discuss.ray.io/t/running-java-api-tests/549/10 "2021-01-26T03:14:32Z")
@doru1004 is your Ray installed in a pyenv or virtualenv Python? If so, you will need to run the Java tests in a shell environment where the ray command is available. * * * update: or set correct env vars in your Java IDE. ---
**Author:** ![doru1004](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/doru1004/32/291_2.png) [@doru1004](https://discuss.ray.io/u/doru1004)\ **Post date:** [January 26, 2021, 6:18am UTC](https://discuss.ray.io/t/running-java-api-tests/549/11 "2021-01-26T06:18:10Z")
@raulchen I am running directly on my machine. I managed to get the tests to run, 4 tests didn’t finish successfully though, but the rest did. I’m attaching the summary: ```auto [ERROR] Failures: [ERROR] io.ray.test.ClassLoaderTest.testClassLoaderInMultiThreading(io.ray.test.ClassLoaderTest) [INFO] Run 1: PASS [INFO] Run 2: PASS [ERROR] Run 3: ClassLoaderTest.testClassLoaderInMultiThreading:103 » RayActor The actor cb576... [INFO] [ERROR] io.ray.test.FailureTest.testGetThrowsQuicklyWhenFoundException(io.ray.test.FailureTest) [INFO] Run 1: PASS [INFO] Run 2: PASS [ERROR] Run 3: FailureTest.testGetThrowsQuicklyWhenFoundException:149 Should fail quickly. Actual execution time: 5596 ms. expected [true] but found [false] [INFO] [ERROR] io.ray.test.GcsClientTest.testGetAllNodeInfo(io.ray.test.GcsClientTest) [INFO] Run 1: PASS [INFO] Run 2: PASS [ERROR] Run 3: GcsClientTest.testGetAllNodeInfo:34 expected [9.163.80.145] but found [192.168.1.187] [INFO] [ERROR] JobConfigTest.tearDownJobConfig:27 » NullPointer [INFO] [ERROR] Tests run: 109, Failures: 4, Errors: 0, Skipped: 0 ``` ---
**Author:** ![raulchen](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/raulchen/32/330_2.png) [@raulchen](https://discuss.ray.io/u/raulchen)\ **Post date:** [January 26, 2021, 8:34am UTC](https://discuss.ray.io/t/running-java-api-tests/549/12 "2021-01-26T08:34:24Z")
@doru1004 do these tests fail consistently? There are some flaky Java tests. @kfstorm is looking into them. We’ll probably skip some. ---
**Author:** ![doru1004](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/doru1004/32/291_2.png) [@doru1004](https://discuss.ray.io/u/doru1004)\ **Post date:** [January 26, 2021, 2:52pm UTC](https://discuss.ray.io/t/running-java-api-tests/549/13 "2021-01-26T14:52:48Z")
I only ran them once but I was thinking exactly that, to run them multiple times and see if the same tests fail.