java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException	at org.apache.hadoop.hbase.util.Bytes.toInt(Bytes.java:767)	at org.apache.hadoop.hbase.util.Bytes.toInt(Bytes.java:754)	at org.apache.hadoop.hbase.KeyValue.getKeyLength(KeyValue.java:1253)	at org.apache.hadoop.hbase.regionserver.wal.SecureWALCellCodec$EncryptedKvEncoder.write(SecureWALCellCodec.java:194)	at org.apache.hadoop.hbase.regionserver.wal.ProtobufLogWriter.append(ProtobufLogWriter.java:117)	at org.apache.hadoop.hbase.regionserver.wal.FSHLog$AsyncWriter.run(FSHLog.java:1137)	at java.lang.Thread.run(Thread.java:745)