AppEngine RemoteAPI SocketTimeoutException

Question

我使用RemoteAPI从GAE数据存储中获取实体，每次300个。

我正在做的事情大致如下：

while(!(emails = getEmails()).isEmpty()) {

  Filter filter = new FilterPredicate("email", FilterOperator.IN, emails)
  Query query = new Query("MyEntity").setFilter(filter);
  QueryResultIterable<Entity> result = ds.prepare(query).asQueryResultIterable();

  for (Entity entity : result) {
    System.out.println(entity.getProperty("name"));
  }
}

我在处理50000封电子邮件。当我第一次运行这段代码时，它大概运行了3/4，然后抛出了下面的异常。现在，它在单循环迭代运行后抛出它。

com.google.appengine.tools.remoteapi.RemoteApiException: remote API call: I/O error
at com.google.appengine.tools.remoteapi.RemoteRpc.makeException(RemoteRpc.java:160)
at com.google.appengine.tools.remoteapi.RemoteRpc.callImpl(RemoteRpc.java:104)
at com.google.appengine.tools.remoteapi.RemoteRpc.call(RemoteRpc.java:50)
at com.google.appengine.tools.remoteapi.RemoteDatastore.runQuery(RemoteDatastore.java:156)
at com.google.appengine.tools.remoteapi.RemoteDatastore.handleRunQuery(RemoteDatastore.java:115)
at com.google.appengine.tools.remoteapi.RemoteDatastore.handleDatastoreCall(RemoteDatastore.java:93)
at com.google.appengine.tools.remoteapi.RemoteApiDelegate.makeDefaultSyncCall(RemoteApiDelegate.java:57)
at com.google.appengine.tools.remoteapi.StandaloneRemoteApiDelegate.makeSyncCall(StandaloneRemoteApiDelegate.java:47)
at com.google.appengine.tools.remoteapi.StandaloneRemoteApiDelegate$1.call(StandaloneRemoteApiDelegate.java:58)
at com.google.appengine.tools.remoteapi.StandaloneRemoteApiDelegate$1.call(StandaloneRemoteApiDelegate.java:54)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:152)
at java.net.SocketInputStream.read(SocketInputStream.java:122)
at sun.security.ssl.InputRecord.readFully(InputRecord.java:442)
at sun.security.ssl.InputRecord.read(InputRecord.java:480)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:934)
at sun.security.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:891)
at sun.security.ssl.AppInputStream.read(AppInputStream.java:102)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:275)
at java.io.BufferedInputStream.read(BufferedInputStream.java:334)
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:690)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:633)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1324)
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:468)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:338)
at com.google.appengine.repackaged.com.google.api.client.http.javanet.NetHttpResponse.<init>(NetHttpResponse.java:37)
at com.google.appengine.repackaged.com.google.api.client.http.javanet.NetHttpRequest.execute(NetHttpRequest.java:94)
at com.google.appengine.repackaged.com.google.api.client.http.HttpRequest.execute(HttpRequest.java:972)
at com.google.appengine.tools.remoteapi.OAuthClient.post(OAuthClient.java:54)
at com.google.appengine.tools.remoteapi.RemoteRpc.callImpl(RemoteRpc.java:102)
... 12 more

我不知道问题出在哪里，但是在抛出异常之前，代码似乎正在计算for()条件。

这会不会是一个配额问题？配额详细信息屏幕没有显示任何问题，并且我在文档中找不到任何相关信息。

Answer 1

对于这个问题的未来读者，如果您看到RemoteApiException: remote API call: I/O error的发生是持续的，而不是间歇性的，这可能与网络连接中断有关，也可能与App Engine端的远程问题有关。

如果排除了第一种可能性，最好的行动方案是在Google App Engine issue tracker上报告该问题。

Answer 2

要解决此问题，请首先检查您的Internet连接。然后清理所有工件，并通过(使用IntelliJ)重新构建它们：

在Build Artifacts...

• Focus Clean

• Focus Build

上，通过

1. 转到Build => Build Artifacts...
2. Focus on => All Artifacts =>