问Android TIMManager.login返回9519错误是什么情况？

 /Network   -imsession_sso_session.cpp.1187  CheckPacketResend          /resend packet|cmd: wtlogin64.trans_emp|seq: 2529590011|left time: 9915
 /Network   -imsession_sso_session.cpp.362  operator()                  /packet timeout|cmd: wtlogin64.trans_emp|seq: 2529590011|resend: true
 /Common    -transport.cpp.173  RequestCallbackOnErrorAsync             /recv error code: 9519, errmsg: Channel send packet timeout
 /Common    -imcore_manager.cpp.567  operator()                         /code: 9519, errMsg: Channel send packet timeout