Hi, Just now migrated to 1.0.3 and got same error.
I did folowing; 1) Create CF with compression 2) Update cf metadata on new created CF. update failed with same Exception about Caused by: java.util.concurrent. ExecutionException: java.io.IOException: org.apache.cassandra.config.ConfigurationException: Invalid negative or null chunk_length_kb After removing compression settings update succeed. Evgeny.