Couchbase Lite 拉式复制在示例 Couchbase 移动端到端测试项目中失败并出现错误

Question

我开始使用 Couchbase Mobile。我最感兴趣的功能（目前）是PULL复制（保持移动数据与后端数据库同步）。

我按照使用 Docker 使用 Couchbase Mobile 进行开发中描述的步骤进行了操作，并在本地部署了 Couchbase 服务器 (enterprise-6.5.0) 和同步网关 (2.7.0-enterprise)。我已经添加了beer-sample数据库（有 ~8400 个文档），现在我正在尝试将它复制到一个 android 应用程序上。我自定义了Userprofile Couchbase Mobile Android项目，并将其指向我的本地同步网关。我有一段代码要复制，如下所示：

  public static void startPullReplication() {
    Log.i("Pull", "Start pull beer-sample");
    URI url = null;
    try {
      url = new URI(String.format("%s/%s", "ws://10.0.1.7:4984", beerSampleDbName));
    } catch (URISyntaxException e) {
      e.printStackTrace();
    }

    ReplicatorConfiguration config =
        new ReplicatorConfiguration(beerSampleDatabase, new URLEndpoint(url)); // <1>
    config.setReplicatorType(ReplicatorConfiguration.ReplicatorType.PULL); // <2>
    config.setContinuous(true); // <3>
    config.setAuthenticator(new BasicAuthenticator("admin", "password")); // <4>
    //    config.setChannels(Arrays.asList("channel." + "admin")); // <5>

    replicator = new Replicator(config);
    replicatorListenerToken =
        replicator.addChangeListener(
            new ReplicatorChangeListener() {
              @Override
              public void changed(ReplicatorChange change) {
                Log.i("Pull", "Changed pull beer sample : " + change.getStatus());
                if (change
                    .getReplicator()
                    .getStatus()
                    .getActivityLevel()
                    .equals(Replicator.ActivityLevel.IDLE)) {
                  Log.i("Replication Comp Log", "Scheduler Completed");
                }
                if (change
                        .getReplicator()
                        .getStatus()
                        .getActivityLevel()
                        .equals(Replicator.ActivityLevel.STOPPED)
                    || change
                        .getReplicator()
                        .getStatus()
                        .getActivityLevel()
                        .equals(Replicator.ActivityLevel.OFFLINE)) {
                  Log.i("Rep Scheduler  Log", "ReplicationTag Stopped");
                }
              }
            });
    replicator.start();

    Log.i("Pull", "Replication beer-sample started");
  }

并听听数据库中的变化，如下所示：

  private void registerForDatabaseChanges() {
    beerSampleListenerToken =
        beerSampleDatabase.addChangeListener(
            new DatabaseChangeListener() {
              Integer i=0;
              @Override
              public void changed(@NonNull DatabaseChange change) {
                Log.i("DatabaseChangeEvent", String.valueOf(i));
                i++;
                for (String docId : change.getDocumentIDs()) {
                  Document doc = beerSampleDatabase.getDocument(docId);
                  if (doc != null) {
                    Log.i("DatabaseChangeEvent", doc.getId() + ": Document was added/updated");
                  } else {
                    Log.i("DatabaseChangeEvent", docId + "Document was deleted");
                  }
                }
              }
            });
  }

现在，当我运行该应用程序时，我收到以下日志。

2020-02-11 15:44:46.420 22513-22513/com.cbmob.testapp W/CouchbaseLite/DATABASE: Database.log.getFile().getConfig() is null, meaning file logging is disabled.  Log files required for product support are not being generated.
2020-02-11 15:44:46.615 22513-22545/com.cbmob.testapp D/OpenGLRenderer: HWUI GL Pipeline
2020-02-11 15:44:46.744 22513-22545/com.cbmob.testapp I/zygote: android::hardware::configstore::V1_0::ISurfaceFlingerConfigs::hasWideColorDisplay retrieved: 0
2020-02-11 15:44:46.744 22513-22545/com.cbmob.testapp I/OpenGLRenderer: Initialized EGL, version 1.4
2020-02-11 15:44:46.744 22513-22545/com.cbmob.testapp D/OpenGLRenderer: Swap behavior 1
2020-02-11 15:44:46.745 22513-22545/com.cbmob.testapp W/OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
2020-02-11 15:44:46.745 22513-22545/com.cbmob.testapp D/OpenGLRenderer: Swap behavior 0
2020-02-11 15:44:46.752 22513-22545/com.cbmob.testapp D/EGL_emulation: eglCreateContext: 0xa9f30d40: maj 3 min 0 rcv 3
2020-02-11 15:44:46.765 22513-22545/com.cbmob.testapp D/EGL_emulation: eglMakeCurrent: 0xa9f30d40: ver 3 0 (tinfo 0x9f7bf880)
2020-02-11 15:44:46.976 22513-22545/com.cbmob.testapp D/EGL_emulation: eglMakeCurrent: 0xa9f30d40: ver 3 0 (tinfo 0x9f7bf880)



2020-02-11 15:44:56.458 22513-22513/com.cbmob.testapp I/Pull: Start pull beer-sample
2020-02-11 15:44:56.480 22513-22576/com.cbmob.testapp W/CouchbaseLite/NETWORK: C4Socket.open() socket -> 2852069288
2020-02-11 15:44:56.480 22513-22576/com.cbmob.testapp W/CouchbaseLite/NETWORK: C4Socket.open() clazz -> com.couchbase.lite.internal.replicator.CBLWebSocket
2020-02-11 15:44:56.482 22513-22513/com.cbmob.testapp I/Pull: Replication beer-sample started
2020-02-11 15:44:56.497 22513-22513/com.cbmob.testapp I/Pull: Changed pull beer sample : Status{activityLevel=CONNECTING, progress=Progress{completed=0, total=0}, error=null}
2020-02-11 15:44:56.519 22513-22576/com.cbmob.testapp D/NetworkSecurityConfig: No Network Security Config specified, using platform default
2020-02-11 15:44:56.528 22513-22576/com.cbmob.testapp E/CouchbaseLite/NETWORK: CBLWebSocket.socket_open()
2020-02-11 15:44:56.582 22513-22576/com.cbmob.testapp W/CouchbaseLite/NETWORK: C4Socket.write() handle -> 2852069288
2020-02-11 15:44:56.586 22513-22576/com.cbmob.testapp W/CouchbaseLite/NETWORK: completedWrite(long) handle -> 2852069288, byteCount -> 68
2020-02-11 15:44:56.591 22513-22513/com.cbmob.testapp I/Pull: Changed pull beer sample : Status{activityLevel=BUSY, progress=Progress{completed=0, total=0}, error=null}
2020-02-11 15:44:56.591 22513-22576/com.cbmob.testapp W/CouchbaseLite/NETWORK: C4Socket.write() handle -> 2852069288
2020-02-11 15:44:56.592 22513-22576/com.cbmob.testapp W/CouchbaseLite/NETWORK: completedWrite(long) handle -> 2852069288, byteCount -> 121
2020-02-11 15:44:56.605 22513-22577/com.cbmob.testapp W/CouchbaseLite/NETWORK: C4Socket.completedReceive() handle -> 2852069288
2020-02-11 15:44:56.608 22513-22577/com.cbmob.testapp I/chatty: uid=10086(com.cbmob.testapp) Thread-9 identical 1 line
2020-02-11 15:44:56.612 22513-22577/com.cbmob.testapp W/CouchbaseLite/NETWORK: C4Socket.completedReceive() handle -> 2852069288
2020-02-11 15:44:56.627 22513-22513/com.cbmob.testapp I/Pull: Changed pull beer sample : Status{activityLevel=IDLE, progress=Progress{completed=0, total=0}, error=null}
2020-02-11 15:44:56.628 22513-22513/com.cbmob.testapp E/Replication Comp Log: Scheduler Completed

显然，数据库中的文档更改没有被记录。由此，我假设复制根本没有发生。我不知道如何去调试这个。如果有人对如何调试它有任何指示，我将不胜感激。如果需要，我可以发布同步网关日志。

如果有人有任何指向任何博客或项目的链接，这些链接解释了如何让所有部分协同工作，请分享。

期待听到人们的回音。

Answer 1

经过整个过程的痛苦旅程并且从模拟器的调试日志中没有得到任何线索后，我尝试在真实设备上运行该应用程序，它记录了一条错误日志语句，该语句的意思是不允许与网络（我丢失了确切的日志语句）。深入研究该问题后，我了解到我的目标是 API 28，如此处所述，对于 API >= 28，默认cleartextTrafficPermitted值为false。设置它来true解决问题。

我希望这可以帮助某人节省时间。