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Filesystem closed**
java.io.IOException: Filesystem closed	at org.apache.hadoop.hdfs.DFSClient.checkOpen(DFSClient.java:798)	at org.apache.hadoop.hdfs.DFSOutputStream.flushOrSync(DFSOutputStream.java:1985)	at org.apache.hadoop.hdfs.DFSOutputStream.hsync(DFSOutputStream.java:1968)	at org.apache.hadoop.hdfs.client.HdfsDataOutputStream.hsync(HdfsDataOutputStream.java:95)	at com.netentsec.ueba.topology.bolts.HDFSBolt.syncTuples(HDFSBolt.java:104)	at org.apache.storm.hdfs.bolt.AbstractHdfsBolt.execute(AbstractHdfsBolt.java:174)	at org.apache.storm.daemon.executor$fn__8058$tuple_action_fn__8060.invoke(executor.clj:731)	at org.apache.storm.daemon.executor$mk_task_receiver$fn__7979.invoke(executor.clj:464)	at org.apache.storm.disruptor$clojure_handler$reify__7492.onEvent(disruptor.clj:40)	at org.apache.storm.utils.DisruptorQueue.consumeBatchToCursor(DisruptorQueue.java:451)	at org.apache.storm.utils.DisruptorQueue.consumeBatchWhenAvailable(DisruptorQueue.java:430)	at org.apache.storm.disruptor$consume_batch_when_available.invoke(disruptor.clj:73)	at org.apache.storm.daemon.executor$fn__8058$fn__8071$fn__8124.invoke(executor.clj:850)	at org.apache.storm.util$async_loop$fn__624.invoke(util.clj:484)	at clojure.lang.AFn.run(AFn.java:22)	at java.lang.Thread.run(Thread.java:745)