Some times, when I try to insert a data in Cassandra with Method: static void createColumnFamily(String keySpace, String columnFamily){ synchronized (mutex){ Iface cs = new CassandraServer(); CfDef cfDef = new CfDef(keySpace, columnFamily);
cfDef = cfDef.setComparator_type(comparator.toString()); cfDef = cfDef.setKey_validation_class(UTF8Type.class.getName()); cfDef = cfDef.setCaching("all"); cs.set_keyspace(keySpace); cs.system_add_column_family(cfDef); } } I run this method in only on process of the distributor system. But in this process, I run the method two times consecutive in the same thread, but with keyspace diferent. I already read in the documentation that this error occurs when more than one thread/processor access the same place in the Cassandra, but I think this is not occuring. Some one cold help me to understand this problem? Thanks. -- Everton Lima Aleixo Bacharel em Ciencia da Computação Universidade Federal de Goiás