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java.lang.IllegalStateException: Not started	at io.druid.common.config.Log4jShutdown.addShutdownCallback(Log4jShutdown.java:45)	at org.apache.logging.log4j.core.impl.Log4jContextFactory.addShutdownCallback(Log4jContextFactory.java:273)	at org.apache.logging.log4j.core.LoggerContext.setUpShutdownHook(LoggerContext.java:256)	at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:216)	at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:145)	at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:41)	at org.apache.logging.log4j.LogManager.getContext(LogManager.java:182)	at org.apache.logging.log4j.spi.AbstractLoggerAdapter.getContext(AbstractLoggerAdapter.java:103)	at org.apache.logging.slf4j.Log4jLoggerFactory.getContext(Log4jLoggerFactory.java:43)	at org.apache.logging.log4j.spi.AbstractLoggerAdapter.getLogger(AbstractLoggerAdapter.java:42)	at org.apache.logging.slf4j.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:29)	at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:284)	at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:155)	at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:132)	at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:685)	at org.apache.hadoop.hdfs.LeaseRenewer.(LeaseRenewer.java:72)	at org.apache.hadoop.hdfs.DFSClient.getLeaseRenewer(DFSClient.java:699)	at org.apache.hadoop.hdfs.DFSClient.close(DFSClient.java:859)	at org.apache.hadoop.hdfs.DistributedFileSystem.close(DistributedFileSystem.java:853)	at org.apache.hadoop.fs.FileSystem$Cache.closeAll(FileSystem.java:2407)	at org.apache.hadoop.fs.FileSystem$Cache$ClientFinalizer.run(FileSystem.java:2424)	at org.apache.hadoop.util.ShutdownHookManager$1.run(ShutdownHookManager.java:54)