java做的系统在was升级后有时产生java.net.SocketException

[14-4-16 15:10:58:343 CST] 00009de3 SystemErr     R java.net.SocketException: 没有进程来读取写入管道的数据。
[14-4-16 15:10:58:343 CST] 00009de3 SystemErr     R         at java.net.SocketOutputStream.socketWrite0(Native Method)
[14-4-16 15:10:58:343 CST] 00009de3 SystemErr     R         at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:103)
[14-4-16 15:10:58:343 CST] 00009de3 SystemErr     R         at java.net.SocketOutputStream.write(SocketOutputStream.java:147)
[14-4-16 15:10:58:343 CST] 00009de3 SystemErr     R         at java.io.BufferedOutputStream.write(BufferedOutputStream.java:116)
[14-4-16 15:10:58:343 CST] 00009de3 SystemErr     R         at sun.net.TelnetOutputStream.write(TelnetOutputStream.java:127)
[14-4-16 15:10:58:343 CST] 00009de3 SystemErr     R         at com.cncsi.admin.uploadfile.UploadAction.upload(UploadAction.java:1110)
[14-4-16 15:10:58:343 CST] 00009de3 SystemErr     R         at com.cncsi.admin.uploadfile.UploadAction.thunisUpload(UploadAction.java:964)
[14-4-16 15:10:58:343 CST] 00009de3 SystemErr     R         at com.cncsi.admin.uploadfile.UploadThread.run(UploadThread.java:20)

os.write(bytes, 0, c);这一行报的错
有大神知道是怎么回事吗