java.lang.RuntimeException: java.lang.NullPointerException
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java.lang.RuntimeException: java.lang.NullPointerExceptionat org.apache.cassandra.db.ColumnFamilyStore.runWithCompactionsDisabled(ColumnFamilyStore.java:2760)[apache-cassandra-2.2.1.redhat-2.jar:2.2.1.redhat-2]at org.apache.cassandra.db.ColumnFamilyStore.truncateBlocking(ColumnFamilyStore.java:2721)[apache-cassandra-2.2.1.redhat-2.jar:2.2.1.redhat-2]at org.apache.cassandra.db.SystemKeyspace.discardCompactionsInProgress(SystemKeyspace.java:405)[apache-cassandra-2.2.1.redhat-2.jar:2.2.1.redhat-2]at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:218)[apache-cassandra-2.2.1.redhat-2.jar:2.2.1.redhat-2]at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:488)[apache-cassandra-2.2.1.redhat-2.jar:2.2.1.redhat-2]at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:595)[apache-cassandra-2.2.1.redhat-2.jar:2.2.1.redhat-2]Caused by: java.lang.NullPointerException: nullat org.apache.cassandra.db.Directories.getSnapshotDirectory(Directories.java:425)[apache-cassandra-2.2.1.redhat-2.jar:2.2.1.redhat-2]at org.apache.cassandra.db.Directories.getSnapshotManifestFile(Directories.java:437)[apache-cassandra-2.2.1.redhat-2.jar:2.2.1.redhat-2]at org.apache.cassandra.db.ColumnFamilyStore.writeSnapshotManifest(ColumnFamilyStore.java:2385)[apache-cassandra-2.2.1.redhat-2.jar:2.2.1.redhat-2]at org.apache.cassandra.db.ColumnFamilyStore.snapshotWithoutFlush(ColumnFamilyStore.java:2375)[apache-cassandra-2.2.1.redhat-2.jar:2.2.1.redhat-2]at org.apache.cassandra.db.ColumnFamilyStore.snapshot(ColumnFamilyStore.java:2492)[apache-cassandra-2.2.1.redhat-2.jar:2.2.1.redhat-2]at org.apache.cassandra.db.ColumnFamilyStore.snapshot(ColumnFamilyStore.java:2482)[apache-cassandra-2.2.1.redhat-2.jar:2.2.1.redhat-2]at org.apache.cassandra.db.ColumnFamilyStore$12.run(ColumnFamilyStore.java:2708)[apache-cassandra-2.2.1.redhat-2.jar:2.2.1.redhat-2]at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)[na:1.8.0_91]at org.apache.cassandra.db.ColumnFamilyStore.runWithCompactionsDisabled(ColumnFamilyStore.java:2756)[apache-cassandra-2.2.1.redhat-2.jar:2.2.1.redhat-2]... 5 more