WARN sshd BufferException: Underflow in gerrit 2.13.7

[vista...@gmail.com]

When gerrit was upgraded from 2.12.4 to 2.13.7,  I find the warn msg in error_log.

[2017-04-05 09:21:22,246] [sshd-SshServer[3b6c7bae]-nio2-thread-18] WARN  org.apache.sshd.server.session.ServerSessionImpl : exceptionCaught(ServerSessionImpl[xxxx@/yyyyy:47277])[state=Opened] BufferException: Underflow

This happen when accouts do somethings by ssh