Question

在测试中，我发现搜索服务实现有时会出现锁争用问题。我看到如下错误：

Dec 30, 2017 6:09:28 PM 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@/[path]/WEB-INF/appengine-generated/indexes/dGVzdA/Ym9va3Rh..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.<init>(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.GeneratedMethodAccessor9.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.invokeApiMethodJava(ApiProxyLocalImpl.java:604)
    at com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.callInternal(ApiProxyLocalImpl.java:559)
    at com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.call(ApiProxyLocalImpl.java:516)
    at com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.call(ApiProxyLocalImpl.java:488)
    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:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

这似乎与测试本身的任何基本竞争条件无关，但会导致测试出现瑕疵。有没有人可以解决这个错误？

Answer 1

事实证明，这是因为在没有搜索服务测试配置的测试中使用搜索服务索引器。将正确的配置添加到有问题的测试中解决了这个问题。

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

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

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

由于锁定争用，Google Appengine LocalSearchService在测试中失败

1 个答案: