Hi all, I am using Nifi v 1.20. on windows 8 It used work fine. After restarting the system the nifi does not start up. I had check status Its keep getting "Apacha Nifi not running". Thanks Below are logs from nifi-bootstrap.log file- 2017-07-05 15:41:57,105 WARN [NiFi Bootstrap Command Listener] org.apache.nifi.bootstrap.RunNiFi Failed to set permissions so that only the owner can read pid file E:\softwares\nifi-1.2.0\bin\..\run\nifi.pid; this may allows others to have access to the key needed to communicate with NiFi. Permissions should be changed so that only the owner can read this file 2017-07-05 15:41:57,142 WARN [NiFi Bootstrap Command Listener] org.apache.nifi.bootstrap.RunNiFi Failed to set permissions so that only the owner can read status file E:\softwares\nifi-1.2.0\bin\..\run\nifi.status; this may allows others to have access to the key needed to communicate with NiFi. Permissions should be changed so that only the owner can read this file 2017-07-05 15:41:57,168 INFO [NiFi Bootstrap Command Listener] org.apache.nifi.bootstrap.RunNiFi Apache NiFi now running and listening for Bootstrap requests on port 50765 2017-07-05 15:43:12,077 ERROR [NiFi logging handler] org.apache.nifi.StdErr Failed to start web server: Unable to start Flow Controller. 2017-07-05 15:43:12,078 ERROR [NiFi logging handler] org.apache.nifi.StdErr Shutting down... 2017-07-05 15:43:14,501 INFO [main] org.apache.nifi.bootstrap.RunNiFi NiFi never started. Will not restart NiFi Below is the stack trace from nifi-app.log file - 2017-07-05 15:43:12,077 WARN [main] org.apache.nifi.web.server.JettyServer Failed to start web server... shutting down. org.apache.nifi.web.NiFiCoreException: Unable to start Flow Controller. at org.apache.nifi.web.contextlistener.ApplicationStartupContextListener.contextInitialized(ApplicationStartupContextListener.java:88) at org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:876) at org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:532) at org.eclipse.jetty.server.handler.ContextHandler.startContext(ContextHandler.java:839) at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:344) at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1480) at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1442) at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:799) at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:261) at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:540) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:131) at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:113) at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:113) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:131) at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:105) at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:113) at org.eclipse.jetty.server.handler.gzip.GzipHandler.doStart(GzipHandler.java:290) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:131) at org.eclipse.jetty.server.Server.start(Server.java:452) at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:105) at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:113) at org.eclipse.jetty.server.Server.doStart(Server.java:419) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at org.apache.nifi.web.server.JettyServer.start(JettyServer.java:695) at org.apache.nifi.NiFi.<init>(NiFi.java:160) at org.apache.nifi.NiFi.main(NiFi.java:267) Caused by: java.io.IOException: Expected to read a Sentinel Byte of '1' but got a value of '0' instead at org.apache.nifi.repository.schema.SchemaRecordReader.readRecord(SchemaRecordReader.java:65) at org.apache.nifi.controller.repository.SchemaRepositoryRecordSerde.deserializeRecord(SchemaRepositoryRecordSerde.java:115) at org.apache.nifi.controller.repository.SchemaRepositoryRecordSerde.deserializeEdit(SchemaRepositoryRecordSerde.java:109) at org.apache.nifi.controller.repository.SchemaRepositoryRecordSerde.deserializeEdit(SchemaRepositoryRecordSerde.java:46) at org.wali.MinimalLockingWriteAheadLog$Partition.recoverNextTransaction(MinimalLockingWriteAheadLog.java:1096) at org.wali.MinimalLockingWriteAheadLog.recoverFromEdits(MinimalLockingWriteAheadLog.java:459) at org.wali.MinimalLockingWriteAheadLog.recoverRecords(MinimalLockingWriteAheadLog.java:301) at org.apache.nifi.controller.repository.WriteAheadFlowFileRepository.loadFlowFiles(WriteAheadFlowFileRepository.java:381) at org.apache.nifi.controller.FlowController.initializeFlow(FlowController.java:712) at org.apache.nifi.controller.StandardFlowService.initializeController(StandardFlowService.java:953) at org.apache.nifi.controller.StandardFlowService.load(StandardFlowService.java:534) at org.apache.nifi.web.contextlistener.ApplicationStartupContextListener.contextInitialized(ApplicationStartupContextListener.java:72) ... 28 common frames omitted ... 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