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java.lang.OutOfMemoryError: Direct buffer memory	at java.nio.Bits.reserveMemory(Bits.java:658)	at java.nio.DirectByteBuffer.(DirectByteBuffer.java:123)	at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:311)	at org.apache.cassandra.io.compress.BufferType$2.allocate(BufferType.java:35)	at org.apache.cassandra.io.util.RandomAccessReader.allocateBuffer(RandomAccessReader.java:69)	at org.apache.cassandra.io.compress.CompressedRandomAccessReader.(CompressedRandomAccessReader.java:88)	at org.apache.cassandra.io.compress.CompressedRandomAccessReader.open(CompressedRandomAccessReader.java:58)	at org.apache.cassandra.io.util.CompressedPoolingSegmentedFile.createPooledReader(CompressedPoolingSegmentedFile.java:124)	at org.apache.cassandra.io.util.PoolingSegmentedFile.getSegment(PoolingSegmentedFile.java:63)	at org.apache.cassandra.io.sstable.format.SSTableReader.getFileDataInput(SSTableReader.java:1743)	at org.apache.cassandra.io.sstable.format.big.SimpleSliceReader.(SimpleSliceReader.java:57)	at org.apache.cassandra.io.sstable.format.big.SSTableSliceIterator.createReader(SSTableSliceIterator.java:66)	at org.apache.cassandra.io.sstable.format.big.SSTableSliceIterator.(SSTableSliceIterator.java:43)	at org.apache.cassandra.io.sstable.format.big.BigTableReader.iterator(BigTableReader.java:75)	at org.apache.cassandra.db.filter.SliceQueryFilter.getSSTableColumnIterator(SliceQueryFilter.java:246)	at org.apache.cassandra.db.filter.QueryFilter.getSSTableColumnIterator(QueryFilter.java:62)	at org.apache.cassandra.db.CollationController.collectAllData(CollationController.java:270)	at org.apache.cassandra.db.CollationController.getTopLevelColumns(CollationController.java:64)	at org.apache.cassandra.db.ColumnFamilyStore.getTopLevelColumns(ColumnFamilyStore.java:2009)	at org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1813)	at org.apache.cassandra.db.Keyspace.getRow(Keyspace.java:360)	at org.apache.cassandra.db.SliceFromReadCommand.getRow(SliceFromReadCommand.java:85)	at org.apache.cassandra.cql3.statements.SelectStatement.readLocally(SelectStatement.java:288)	at org.apache.cassandra.cql3.statements.SelectStatement.executeInternal(SelectStatement.java:304)	at org.apache.cassandra.cql3.statements.SelectStatement.executeInternal(SelectStatement.java:76)	at org.apache.cassandra.cql3.QueryProcessor.executeInternal(QueryProcessor.java:310)	at org.apache.cassandra.db.SystemKeyspace.getSSTableReadMeter(SystemKeyspace.java:956)	at org.apache.cassandra.io.sstable.format.SSTableReader$GlobalTidy.ensureReadMeter(SSTableReader.java:2234)	at org.apache.cassandra.io.sstable.format.SSTableReader$InstanceTidier.setup(SSTableReader.java:2045)	at org.apache.cassandra.io.sstable.format.SSTableReader.setup(SSTableReader.java:1986)	at org.apache.cassandra.io.sstable.format.SSTableReader.open(SSTableReader.java:461)	at org.apache.cassandra.io.sstable.format.SSTableReader.open(SSTableReader.java:363)	at org.apache.cassandra.io.sstable.format.SSTableReader$4.run(SSTableReader.java:501)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)	at java.util.concurrent.FutureTask.run(FutureTask.java:266)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)