如何避免JUnit App Engine LocalSearchService中的LockObtainFailedException？

Question

I'm using App engine Standard env and my services use the Search API .

So basically in my service I do something like:

IndexSpec indexSpec = IndexSpec.newBuilder().setName(indexName).build();
Index index = SearchServiceFactory.getSearchService().getIndex(indexSpec);
index.putAsync(document);

But when I run my JUnit tests I often get the following exception:

Apr 17, 2018 11:25:33 AM com.google.appengine.api.search.dev.LocalSearchService indexDocumentForApp SEVERE: Unable to access index com.google.appengine.repackaged.org.apache.lucene.store.LockObtainFailedException: Lock obtain timed out: NativeFSLock@/Users/freddyboucher/Private/Programming/LearnKeeper/learnkeeper-server/WEB-INF/appengine-generated/indexes/dGVzdA/Qk9PS1M..P/write.lock at com.google.appengine.repackaged.org.apache.lucene.store.Lock.obtain(Lock.java:85) at com.google.appengine.repackaged.org.apache.lucene.index.IndexWriter.init(IndexWriter.java:1562) at com.google.appengine.repackaged.org.apache.lucene.index.IndexWriter.(IndexWriter.java:1090) at com.google.appengine.api.search.dev.LocalSearchService.getIndexWriter(LocalSearchService.java:800) at com.google.appengine.api.search.dev.LocalSearchService.indexDocumentForApp(LocalSearchService.java:290) at com.google.appengine.api.search.dev.LocalSearchService.indexDocument(LocalSearchService.java:268) at sun.reflect.NativeMet hodAccessorImpl.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 com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.invokeApiMethodJava(ApiProxyLocalImpl.java:657) at com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.callInternal(ApiProxyLocalImpl.java:612) at com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.call(ApiProxyLocalImpl.java:569) at com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.call(ApiProxyLocalImpl.java:541) at java.util.concurrent.Executors$PrivilegedCallable$1.run(Executors.java:533) at java.security.AccessController.doPrivileged(Native Method) at java.util.concurrent.Executors$PrivilegedCallable.call(Executors.java:530) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util. concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748)

Answer 1

It's not documented anywhere but adding:

LocalSearchServiceTestConfig.getLocalSearchService().stop()

in my @After method fixes the issue.

I also found usefull to add:

FileUtils.deleteDirectory(new File("WEB-INF"));

So the final solution is:

  @After
  public void tearDown() throws Exception {
    LocalSearchServiceTestConfig.getLocalSearchService().stop();
    FileUtils.deleteDirectory(new File("WEB-INF"));
    ...
  }

Answer 2

Worked for me:

private LocalServiceTestHelper memoryDatastore;

@Before
public void setup() {
   LocalDatastoreServiceTestConfig dsConfig = new LocalDatastoreServiceTestConfig();
   memoryDatastore = new LocalServiceTestHelper(dsConfig);
   memoryDatastore.setUp();
}

@After
public void tearDown() {
   memoryDatastore.getLocalService("search").stop();
   memoryDatastore.tearDown();
}

Answer 3

This error can also occur if you simply forget to add a LocalSearchServiceTestConfig to your test config. For example:

    private final LocalServiceTestHelper helper =
            new LocalServiceTestHelper(
                    new LocalDatastoreServiceTestConfig(),
                    new LocalSearchServiceTestConfig());

    @Before
    public void setUp() {
        helper.setUp();
    }

    @After
    public void tearDown() {
        helper.tearDown();
    }