The Broker log is full of Transport failed - Channel was inactive for too long messages.
INFO: Transport failed: java.io.EOFException
INFO: Transport failed: com.itko.activemq.transport.InactivityIOException: Channel was inactive for too long: /xxx.xxx.xxx.xxx:aaaaa
Where: xxx.xxx.xxx.xxx:aaaaa is an IP and port combination.
When starting the broker, a few of these messages is normal.
However, several thousand messages indicate the broker recovering from a corrupt solr cache.