java.lang.UnsatisfiedLinkError:Native method not found

1.com.hyphenate.chat.adapter.EMAChatClient.native_isConnected(Native Method)
2 com.hyphenate.chat.adapter.EMAChatClient.isConnected(Unknown Source)
3 com.hyphenate.chat.EMClient.isConnected(Unknown Source)
4 com.hyphenate.chat.EMClient$5.run(Unknown Source)
5 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
6 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
7 java.lang.Thread.run(Thread.java:841)
 
集成环信sdk，在5.0以下系统报这个错，非必现，但是在bugly上能检测到有很多用户崩溃，有哪位大神遇到过这样的问题？