Cassandra重启报错 java.lang.ClassCastException -

通过CQL创建了若干表格，比如：

CREATE TABLE fileindex(
recid varchar,
agentno varchar,
customerno varchar,
recfile varchar,
createtime varchar,
PRIMARY KEY(recid)
);

CREATE INDEX ON fileindex(agentno);
CREATE INDEX ON fileindex(customerno);
CREATE INDEX ON fileindex(recfile);
CREATE INDEX ON fileindex(createtime);

 然后再表中插入若干数据，运行了一段时间后，重启Cassandra，报了下面的错：

java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.nio.ByteBuffer
at org.apache.cassandra.db.marshal.UTF8Type.compare(UTF8Type.java:27)
at org.apache.cassandra.dht.LocalToken.compareTo(LocalToken.java:45)
at org.apache.cassandra.db.DecoratedKey.compareTo(DecoratedKey.java:89)
at org.apache.cassandra.db.DecoratedKey.compareTo(DecoratedKey.java:38)
at java.util.TreeMap.getEntry(TreeMap.java:328)
at java.util.TreeMap.containsKey(TreeMap.java:209)
at java.util.TreeSet.contains(TreeSet.java:217)
at org.apache.cassandra.io.sstable.SSTableReader.load(SSTableReader.java:396)
at org.apache.cassandra.io.sstable.SSTableReader.open(SSTableReader.java:187)
at org.apache.cassandra.io.sstable.SSTableReader$1.run(SSTableReader.java:225)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.nio.ByteBuffer
at org.apache.cassandra.db.marshal.UTF8Type.compare(UTF8Type.java:27)
at org.apache.cassandra.dht.LocalToken.compareTo(LocalToken.java:45)
at org.apache.cassandra.db.DecoratedKey.compareTo(DecoratedKey.java:89)
at org.apache.cassandra.db.DecoratedKey.compareTo(DecoratedKey.java:38)

找了半天，终于找到答案，原来是Cassandra1.1.1的一个bug（将在Cassandra1.1.2中修复）。

https://issues.apache.org/jira/browse/CASSANDRA-4331

解决方法就是删除saved_caches_directory文件夹中的文件，默认位置是/var/lib/cassandra/saved_caches

然后再重启就没问题了