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java.lang.RuntimeException: java.io.FileNotFoundException: /home/cassandra/data/my_keyspace/my_table/my_keyspace-my_table-jb-51-Data.db (Too many open files)
java.io.FileNotFoundException: /home/cassandra/data/my_keyspace/my_table/my_keyspace-my_table-jb-51-Data.db (Too many open files)	at java.io.RandomAccessFile.open(Native Method)	at java.io.RandomAccessFile.(RandomAccessFile.java:233)	at org.apache.cassandra.io.util.RandomAccessReader.(RandomAccessReader.java:58)	at org.apache.cassandra.io.compress.CompressedRandomAccessReader.(CompressedRandomAccessReader.java:76)	at org.apache.cassandra.io.compress.CompressedRandomAccessReader.open(CompressedRandomAccessReader.java:43)	at org.apache.cassandra.io.util.CompressedPoolingSegmentedFile.createReader(CompressedPoolingSegmentedFile.java:48)	at org.apache.cassandra.io.util.PoolingSegmentedFile.getSegment(PoolingSegmentedFile.java:39)	at org.apache.cassandra.io.sstable.SSTableReader.getFileDataInput(SSTableReader.java:1195)	at org.apache.cassandra.db.columniterator.SimpleSliceReader.(SimpleSliceReader.java:57)	at org.apache.cassandra.db.columniterator.SSTableSliceIterator.createReader(SSTableSliceIterator.java:65)	at org.apache.cassandra.db.columniterator.SSTableSliceIterator.(SSTableSliceIterator.java:42)	at org.apache.cassandra.db.filter.SliceQueryFilter.getSSTableColumnIterator(SliceQueryFilter.java:167)	at org.apache.cassandra.db.filter.QueryFilter.getSSTableColumnIterator(QueryFilter.java:62)	at org.apache.cassandra.db.CollationController.collectAllData(CollationController.java:250)	at org.apache.cassandra.db.CollationController.getTopLevelColumns(CollationController.java:53)	at org.apache.cassandra.db.ColumnFamilyStore.getTopLevelColumns(ColumnFamilyStore.java:1550)	at org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1379)	at org.apache.cassandra.db.Keyspace.getRow(Keyspace.java:327)	at org.apache.cassandra.db.SliceFromReadCommand.getRow(SliceFromReadCommand.java:65)	at org.apache.cassandra.service.pager.SliceQueryPager.queryNextPage(SliceQueryPager.java:77)	at org.apache.cassandra.service.pager.AbstractQueryPager.fetchPage(AbstractQueryPager.java:84)	at org.apache.cassandra.service.pager.SliceQueryPager.fetchPage(SliceQueryPager.java:33)	at org.apache.cassandra.service.pager.QueryPagers$1.next(QueryPagers.java:148)	at org.apache.cassandra.service.pager.QueryPagers$1.next(QueryPagers.java:137)	at org.apache.cassandra.db.Keyspace.indexRow(Keyspace.java:400)	at org.apache.cassandra.db.index.SecondaryIndexBuilder.build(SecondaryIndexBuilder.java:62)	at org.apache.cassandra.db.compaction.CompactionManager$9.run(CompactionManager.java:833)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)	at java.util.concurrent.FutureTask.run(FutureTask.java:166)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)	at java.lang.Thread.run(Thread.java:724)