BufferUnderflowException on large files

[no2chem]

Overview

Bug report. After writing 10,000 500KB entries into the log, even with -Xmx16G, read requests fail with an error after successful server startup:

2017-12-07 03:17:21,221 TRACE [org.corfudb.runtime.clients.NettyClientRouter$2event-0] o.c.r.c.NettyClientRouter - Message routed to BaseClient: CorfuMsg(clientID=e929ab99-53b3-4e18-940d-f45ad371c0ee, requestID=129, epoch=39, buf=PooledSlicedByteBuf(freed), msgType=ERROR_SERVER_EXCEPTION)
 2017-12-07 03:17:21,222 WARN  [org.corfudb.runtime.clients.NettyClientRouter$2event-0] o.c.r.c.BaseClient - Server threw exception for request 129
 java.nio.BufferUnderflowException: null
	at java.nio.HeapByteBuffer.get(HeapByteBuffer.java:151)

The logunit remains unresponsive to any requests and throws BufferUnderflowException. Possibly fixed by #1040.