我在im-app-server中，调用这个方法：IMResult userResult = UserAdmin.getUserByMobile(phone); 出现了以下的错误，想排查是不是当时im-server网络连接超时了，这种情况是偶现的，请问要怎么查看，想弄清楚是不是用户数量多了之后，我们的服务器的处理性能跟不上了。

java.net.SocketTimeoutException: Read timed out
    at java.net.SocketInputStream.socketRead0(Native Method) ~[na:1.8.0_141]
    at java.net.SocketInputStream.socketRead(SocketInputStream.java:116) ~[na:1.8.0_141]
    at java.net.SocketInputStream.read(SocketInputStream.java:171) ~[na:1.8.0_141]
    at java.net.SocketInputStream.read(SocketInputStream.java:141) ~[na:1.8.0_141]
    at org.apache.http.impl.io.SessionInputBufferImpl.streamRead(SessionInputBufferImpl.java:137) ~[httpcore-4.4.13.jar!/:4.4.13]
    at org.apache.http.impl.io.SessionInputBufferImpl.fillBuffer(SessionInputBufferImpl.java:153) ~[httpcore-4.4.13.jar!/:4.4.13]
    at org.apache.http.impl.io.SessionInputBufferImpl.readLine(SessionInputBufferImpl.java:280) ~[httpcore-4.4.13.jar!/:4.4.13]
    at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:138) ~[httpclient-4.5.12.jar!/:4.5.12]
    at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:56) ~[httpclient-4.5.12.jar!/:4.5.12]
    at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:259) ~[httpcore-4.4.13.jar!/:4.4.13]
    at org.apache.http.impl.DefaultBHttpClientConnection.receiveResponseHeader(DefaultBHttpClientConnection.java:163) ~[httpcore-4.4.13.jar!/:4.4.13]
    at org.apache.http.impl.conn.CPoolProxy.receiveResponseHeader(CPoolProxy.java:157) ~[httpclient-4.5.12.jar!/:4.5.12]
    at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:273) ~[httpcore-4.4.13.jar!/:4.4.13]
    at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:125) ~[httpcore-4.4.13.jar!/:4.4.13]
    at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:272) ~[httpclient-4.5.12.jar!/:4.5.12]
    at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:186) ~[httpclient-4.5.12.jar!/:4.5.12]
    at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89) ~[httpclient-4.5.12.jar!/:4.5.12]
    at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110) ~[httpclient-4.5.12.jar!/:4.5.12]
    at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185) ~[httpclient-4.5.12.jar!/:4.5.12]
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83) ~[httpclient-4.5.12.jar!/:4.5.12]
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:108) ~[httpclient-4.5.12.jar!/:4.5.12]
    at cn.wildfirechat.sdk.utilities.AdminHttpUtils.httpJsonPost(AdminHttpUtils.java:153) ~[sdk-1.3.9.jar!/:na]
    at cn.wildfirechat.sdk.UserAdmin.getUserByMobile(UserAdmin.java:26) ~[sdk-1.3.9.jar!/:na]
    at cn.wildfirechat.app.webhook.MetaServiceImpl.handleMessenger(MetaServiceImpl.java:306) [classes!/:0.68]
    at cn.wildfirechat.app.webhook.MetaServiceImpl.asyncHandleMetaWebHook(MetaServiceImpl.java:159) [classes!/:0.68]
    at cn.wildfirechat.app.webhook.MetaServiceImpl.lambda$receiveWebhook$1(MetaServiceImpl.java:117) [classes!/:0.68]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_141]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_141]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[na:1.8.0_141]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[na:1.8.0_141]
    at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_141]