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From Janaki Joshi <janaki8...@gmail.com>
Subject NiFi relaunching every few minutes
Date Fri, 05 May 2017 10:52:25 GMT
Hello all,

I've been using NiFi for a while now. Since last evening I've started
facing an issue that I am unable to get to the root of. My NiFi (Deployed
on an EC2 instance running Ubuntu) keeps relaunching every 3-4 minutes.
Below you can find a snippet of my app.log file. I have highlighted the
area where NiFi suddenly restarts without warning (the portion between the
dashed lines). One change which could be a possible reason is the JVM heap
size. I increased it from 4g to 5g yesterday (I have an 8GB RAM.) Any help
would be appreciated. Thanks in advance.

Regards,
Janaki

nifi-app.log:

2017-05-05 07:01:47,537 INFO [Write-Ahead Local State Provider Maintenance]
org.wali.MinimalLockingWriteAheadLog
org.wali.MinimalLockingWriteAheadLog@28ffa527
checkpointed with 17 Records and 0 Swap Files in 5 milliseconds
(Stop-the-world time = 1 milliseconds, Clear Edit Logs time = 1 millis),
max Transaction ID 50

2017-05-05 07:01:51,028 INFO [pool-8-thread-1]
o.a.n.c.r.WriteAheadFlowFileRepository
Initiating checkpoint of FlowFile Repository

2017-05-05 07:01:51,093 INFO [pool-8-thread-1]
org.wali.MinimalLockingWriteAheadLog
org.wali.MinimalLockingWriteAheadLog@77614e7c checkpointed with 0 Records
and 0 Swap Files in 65 milliseconds (Stop-the-world time = 31 milliseconds,
Clear Edit Logs time = 26 millis), max Transaction ID 7732406

2017-05-05 07:01:51,094 INFO [pool-8-thread-1]
o.a.n.c.r.WriteAheadFlowFileRepository
Successfully checkpointed FlowFile Repository with 0 records in 65
milliseconds

2017-05-05 07:02:02,743 INFO [Flow Service Tasks Thread-1]
o.a.nifi.controller.StandardFlowService Saved flow controller
org.apache.nifi.controller.FlowController@64c45102 // Another save pending
= false

2017-05-05 07:02:49,899 INFO [Flow Service Tasks Thread-1]
o.a.nifi.controller.StandardFlowService Saved flow controller
org.apache.nifi.controller.FlowController@64c45102 // Another save pending
= false

2017-05-05 07:03:48,302 INFO [Write-Ahead Local State Provider Maintenance]
org.wali.MinimalLockingWriteAheadLog
org.wali.MinimalLockingWriteAheadLog@28ffa527
checkpointed with 17 Records and 0 Swap Files in 20 milliseconds
(Stop-the-world time = 0 milliseconds, Clear Edit Logs time = 0 millis),
max Transaction ID 50

2017-05-05 07:03:51,094 INFO [pool-8-thread-1]
o.a.n.c.r.WriteAheadFlowFileRepository
Initiating checkpoint of FlowFile Repository

2017-05-05 07:03:51,748 INFO [pool-8-thread-1]
org.wali.MinimalLockingWriteAheadLog
org.wali.MinimalLockingWriteAheadLog@77614e7c checkpointed with 0 Records
and 0 Swap Files in 653 milliseconds (Stop-the-world time = 108
milliseconds, Clear Edit Logs time = 536 millis), max Transaction ID 7732406


-----------------------------------
2017-05-05 07:03:51,748 INFO [pool-8-thread-1]
o.a.n.c.r.WriteAheadFlowFileRepository
Successfully checkpointed FlowFile Repository with 0 records in 653
milliseconds

2017-05-05 07:04:14,113 INFO [main] org.apache.nifi.NiFi Launching NiFi...
-----------------------------------


2017-05-05 07:04:14,587 INFO [main] o.a.nifi.properties.NiFiPropertiesLoader
Determined default nifi.properties path to be '/home/ubuntu/nifi-1.1.2/./
conf/nifi.properties'
2017-05-05 07:04:14,592 INFO [main] o.a.nifi.properties.NiFiPropertiesLoader
Loaded 121 properties from /home/ubuntu/nifi-1.1.2/./conf/nifi.properties

2017-05-05 07:04:14,602 INFO [main] org.apache.nifi.NiFi Loaded 121
properties

2017-05-05 07:04:14,610 INFO [main] org.apache.nifi.BootstrapListener
Started Bootstrap Listener, Listening for incoming requests on port 42755

2017-05-05 07:04:14,628 INFO [main] org.apache.nifi.BootstrapListener
Successfully initiated communication with Bootstrap

2017-05-05 07:05:04,366 INFO [main] org.apache.nifi.nar.NarClassLoaders
Loaded NAR file: /home/ubuntu/nifi-1.1.2/./work/nar/extensions/nifi-
jetty-bundle-1.1.2.nar-unpacked as class loader org.apache.nifi.nar.
NarClassLoader[./work/nar/extensions/nifi-jetty-bundle-1.1.2.nar-unpacked]

2017-05-05 07:05:04,375 INFO [main] org.apache.nifi.nar.NarClassLoaders
Loaded NAR file: /home/ubuntu/nifi-1.1.2/./work/nar/framework/nifi-
framework-nar-1.1.2.nar-unpacked as class loader org.apache.nifi.nar.
NarClassLoader[./work/nar/framework/nifi-framework-nar-1.1.2.nar-unpacked]

2017-05-05 07:05:04,376 INFO [main] org.apache.nifi.nar.NarClassLoaders
Loaded NAR file:
/home/ubuntu/nifi-1.1.2/./work/nar/extensions/nifi-slack-nar-1.1.2.nar-unpacked
as class loader org.apache.nifi.nar.NarClassLoader[./work/nar/
extensions/nifi-slack-nar-1.1.2.nar-unpacked]

2017-05-05 07:05:04,377 INFO [main] org.apache.nifi.nar.NarClassLoaders
Loaded NAR file: /home/ubuntu/nifi-1.1.2/./work/nar/extensions/nifi-ldap-
iaa-providers-nar-1.1.2.nar-unpacked as class loader org.apache.nifi.nar.
NarClassLoader[./work/nar/extensions/nifi-ldap-iaa-providers-nar-1.1.2.nar-
unpacked]

2017-05-05 07:05:04,378 INFO [main] org.apache.nifi.nar.NarClassLoaders
Loaded NAR file: /home/ubuntu/nifi-1.1.2/./work/nar/extensions/nifi-
provenance-repository-nar-1.1.2.nar-unpacked as class loader
org.apache.nifi.nar.NarClassLoader[./work/nar/extensions/nifi-provenance-
repository-nar-1.1.2.nar-unpacked]

2017-05-05 07:05:04,382 INFO [main] org.apache.nifi.nar.NarClassLoaders
Loaded NAR file:
/home/ubuntu/nifi-1.1.2/./work/nar/extensions/nifi-azure-nar-1.1.2.nar-unpacked
as class loader org.apache.nifi.nar.NarClassLoader[./work/nar/
extensions/nifi-azure-nar-1.1.2.nar-unpacked]

2017-05-05 07:05:04,383 INFO [main] org.apache.nifi.nar.NarClassLoaders
Loaded NAR file: /home/ubuntu/nifi-1.1.2/./work/nar/extensions/nifi-
update-attribute-nar-1.1.2.nar-unpacked as class loader org.apache.nifi.nar.
NarClassLoader[./work/nar/extensions/nifi-update-attribute-nar-1.1.2.nar-
unpacked]

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