NiFi instances not running

[#1]

Hi, We recently deployed NiFi to production server (04/03) and executed few dataflows. But after few hours, it automatically shut down and when i tried to stop and re-start, it's not running. There are no errors in log file nifi-app.log. And in bootstrap log i just see these details. Could you please tell what is going wrong here.

Bootstrap log file :

2020-04-04 00:28:24,785 INFO [main] o.a.n.b.NotificationServiceManager Successfully loaded the following 0 services: []
2020-04-04 00:28:24,791 INFO [main] org.apache.nifi.bootstrap.RunNiFi Registered no Notification Services for Notification Type NIFI_STARTED
2020-04-04 00:28:24,792 INFO [main] org.apache.nifi.bootstrap.RunNiFi Registered no Notification Services for Notification Type NIFI_STOPPED
2020-04-04 00:28:24,792 INFO [main] org.apache.nifi.bootstrap.RunNiFi Registered no Notification Services for Notification Type NIFI_DIED
2020-04-04 00:28:24,857 INFO [main] org.apache.nifi.bootstrap.Command Apache NiFi is not running
2020-04-04 00:28:31,274 INFO [main] o.a.n.b.NotificationServiceManager Successfully loaded the following 0 services: []
2020-04-04 00:28:31,278 INFO [main] org.apache.nifi.bootstrap.RunNiFi Registered no Notification Services for Notification Type NIFI_STARTED
2020-04-04 00:28:31,278 INFO [main] org.apache.nifi.bootstrap.RunNiFi Registered no Notification Services for Notification Type NIFI_STOPPED
2020-04-04 00:28:31,278 INFO [main] org.apache.nifi.bootstrap.RunNiFi Registered no Notification Services for Notification Type NIFI_DIED
2020-04-04 00:28:31,328 INFO [main] org.apache.nifi.bootstrap.RunNiFi Runtime Java version: 1.8.0_211
2020-04-04 00:28:31,334 INFO [main] org.apache.nifi.bootstrap.Command Starting Apache NiFi...
2020-04-04 00:28:31,335 INFO [main] org.apache.nifi.bootstrap.Command Working Directory: /users/quant_hub/nifi/nifi-1.11.1
2020-04-04 00:28:31,335 INFO [main] org.apache.nifi.bootstrap.Command Command: /users/java/jdk1.8.0_211/bin/java -classpath /users/quant_hub/nifi/nifi-1.11.1/./conf:/users/quant_hub/nifi/nifi-1.11.1/./lib/log4j-over-slf4j-1.7.26.jar:/users/quant_hub/nifi/nifi-1.11.1/./lib/jcl-over-slf4j-1.7.26.jar:/users/quant_hub/nifi/nifi-1.11.1/./lib/nifi-framework-api-1.11.1.jar:/users/quant_hub/nifi/nifi-1.11.1/./lib/nifi-properties-1.11.1.jar:/users/quant_hub/nifi/nifi-1.11.1/./lib/jul-to-slf4j-1.7.26.jar:/users/quant_hub/nifi/nifi-1.11.1/./lib/logback-core-1.2.3.jar:/users/quant_hub/nifi/nifi-1.11.1/./lib/slf4j-api-1.7.26.jar:/users/quant_hub/nifi/nifi-1.11.1/./lib/nifi-nar-utils-1.11.1.jar:/users/quant_hub/nifi/nifi-1.11.1/./lib/javax.servlet-api-3.1.0.jar:/users/quant_hub/nifi/nifi-1.11.1/./lib/logback-classic-1.2.3.jar:/users/quant_hub/nifi/nifi-1.11.1/./lib/jetty-schemas-3.1.jar:/users/quant_hub/nifi/nifi-1.11.1/./lib/nifi-api-1.11.1.jar:/users/quant_hub/nifi/nifi-1.11.1/./lib/nifi-runtime-1.11.1.jar -Dorg.apache.jasper.compiler.disablejsr199=true -Xmx4096m -Xms2048m -Djavax.security.auth.useSubjectCredsOnly=true -Djava.security.egd=file:/dev/urandom -Dsun.net.http.allowRestrictedHeaders=true -Djava.net.preferIPv4Stack=true -Djava.awt.headless=true -Djava.protocol.handler.pkgs=sun.net.www.protocol -Dzookeeper.admin.enableServer=false -Dnifi.properties.file.path=/users/quant_hub/nifi/nifi-1.11.1/./conf/nifi.properties -Dnifi.bootstrap.listen.port=39921 -Dapp=NiFi -Dorg.apache.nifi.bootstrap.config.log.dir=/users/quant_hub/nifi/nifi-1.11.1/logs org.apache.nifi.NiFi

[#2 · Accepted solution]

Issue resolved.  Had to re-install NiFi and services are up and running.