WritePending exception from SSH library

2014-08-26 10:31:29.640 CEST [remote-connector-processing-executor-2] WARN o.o.c.s.c.netconf.NetconfDevice - RemoteDevice

: Adding provided but not required sources as required to prevent failures
2014-08-26 10:32:07.647 CEST [nettyThreadgroupModule$NioEventLoopGroupCloseable-5-1] WARN o.o.c.n.n.h.s.c.AsyncSshHandler - Exception while writing to SSH remote on channel [id: 0x2370b85d]
org.apache.sshd.common.io.WritePendingException: null
at org.apache.sshd.common.channel.ChannelAsyncOutputStream.write(ChannelAsyncOutputStream.java:60) ~[na:na]
at org.opendaylight.controller.netconf.nettyutil.handler.ssh.client.AsyncSshHandler.write(AsyncSshHandler.java:161) ~[na:na]
at io.netty.channel.DefaultChannelHandlerContext.invokeWrite(DefaultChannelHandlerContext.java:666) ~[na:na]
at io.netty.channel.DefaultChannelHandlerContext.write(DefaultChannelHandlerContext.java:724) ~[na:na]
at io.netty.channel.DefaultChannelHandlerContext.write(DefaultChannelHandlerContext.java:659) ~[na:na]
at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:117) ~[na:na]
at io.netty.channel.DefaultChannelHandlerContext.invokeWrite(DefaultChannelHandlerContext.java:666) ~[na:na]
at io.netty.channel.DefaultChannelHandlerContext.write(DefaultChannelHandlerContext.java:724) ~[na:na]
at io.netty.channel.DefaultChannelHandlerContext.write(DefaultChannelHandlerContext.java:659) ~[na:na]
at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:117) ~[na:na]
at io.netty.channel.DefaultChannelHandlerContext.invokeWrite(DefaultChannelHandlerContext.java:666) ~[na:na]
at io.netty.channel.DefaultChannelHandlerContext.access$2000(DefaultChannelHandlerContext.java:30) ~[na:na]
at io.netty.channel.DefaultChannelHandlerContext$AbstractWriteTask.write(DefaultChannelHandlerContext.java:945) ~[na:na]
at io.netty.channel.DefaultChannelHandlerContext$WriteAndFlushTask.write(DefaultChannelHandlerContext.java:999) ~[na:na]
at io.netty.channel.DefaultChannelHandlerContext$AbstractWriteTask.run(DefaultChannelHandlerContext.java:934) ~[na:na]
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:370) ~[na:na]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:353) ~[na:na]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116) ~[na:na]
at java.lang.Thread.run(Thread.java:724) ~[na:1.7.0_25]