EOFException after upgrading to 0.5.0

[B R]

Hi guys,

We are in the process of upgrading from Cassandra 0.4.2 to 0.5.0 The first
issue I faced was :

java.lang.OutOfMemoryError: Java heap space
  at org.apache.cassandra.db.CommitLog.recover(CommitLog.java:318)
  at
org.apache.cassandra.db.RecoveryManager.doRecovery(RecoveryManager.java:65)
  at
org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:90)
  at
org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:166)

After search the mailing lists, I found that it was because of an issue with
commit log format. After creating a new file, I could proceed to run a test
sample to insert and read back data. There are no problems with the
application, but in the system log, I have come across hundreds of entries
of the following type.

WARN [UDP Selector Manager] 2010-01-28 18:02:02,828 UdpConnection.java (line
152) Exception was generated at : 01/28/2010 18:02:02 on thread UDP Selector
Manager

java.io.EOFException
    at java.io.DataInputStream.readFully(DataInputStream.java:180)
    at java.io.DataInputStream.readUTF(DataInputStream.java:592)
    at java.io.DataInputStream.readUTF(DataInputStream.java:547)
    at
org.apache.cassandra.net.HeaderSerializer.deserialize(Header.java:160)
    at
org.apache.cassandra.net.HeaderSerializer.deserialize(Header.java:133)
    at
org.apache.cassandra.net.MessageSerializer.deserialize(Message.java:156)
    at
org.apache.cassandra.net.MessageSerializer.deserialize(Message.java:144)
    at org.apache.cassandra.net.UdpConnection.read(UdpConnection.java:143)
    at
org.apache.cassandra.net.SelectorManager.doProcess(SelectorManager.java:149)
    at
org.apache.cassandra.net.SelectorManager.run(SelectorManager.java:107)

Please suggest what could be the reason for this ?

Thanks,

~B