question Re: Nifi 1.2.0 on Windows 2012 Server is not rolling over its log files. in Archives of Support Questions (Read Only)

Nifi 1.2.0 on Windows 2012 Server is not rolling over its log files.

ajviradia — Fri, 23 Jun 2017 07:48:17 GMT

I have NiFi 1.2.0 installed on the Windows 2012 R2 server, it creates the standard logs files as under:

nifi-bootstrap.log
nifi-app.log
nifi-user.log

Issue is that these files are not rolling over daily or based on size. Can someone help? I have attached the logback.xml file.

Also, are the changes to this logback.xml dynamically implemented, or it requires NiFi to get into effect?

Re: Nifi 1.2.0 on Windows 2012 Server is not rolling over its log files.

Anishkumarv — Fri, 23 Jun 2017 14:04:37 GMT

Hi Avi,

Please updated the logback.xml with below correction and restart nifi to reflect the changes.

your logback.xml

<fileNamePattern>
C:\NiFi\nifi-1.2.0\logs\nifi-app_%d{yyyy-MM-dd_HH}.%i.zip
</fileNamePattern>

But it should be:

<fileNamePattern>
C:\NiFi\nifi-1.2.0\logs\nifi-app_%d{yyyy-MM-dd_HH}.%i.log.zip
</fileNamePattern>

Re: Nifi 1.2.0 on Windows 2012 Server is not rolling over its log files.

Schandhok — Fri, 23 Jun 2017 20:51:11 GMT

@AViradia

I suspect that Windows locking mechanism restricts the original file to be renamed(Check http://dev.eclipse.org/mhonarc/lists/jetty-users/msg03222.html for details).

You can omit the file property in logback.xml, and then the active log file will be computed a new for each period based on the value of fileNamePattern. A working rollingpolicy for a NiFi node on Windows is as follows:

<appender name="APP_FILE"> 
<!-- <file>${org.apache.nifi.bootstrap.config.log.dir}/nifi-app.log</file> --> 
<rollingPolicy> 
<!-- 
For daily rollover, use 'app_%d.log'. 
For hourly rollover, use 'app_%d{yyyy-MM-dd_HH}.log'. 
To GZIP rolled files, replace '.log' with '.log.gz'. 
To ZIP rolled files, replace '.log' with '.log.zip'. 
--> 
<fileNamePattern>${org.apache.nifi.bootstrap.config.log.dir}/nifi-app_%d{yyyy-MM-dd_HH}.%i.log</fileNamePattern> 
<timeBasedFileNamingAndTriggeringPolicy> 
<maxFileSize>100MB</maxFileSize> 
</timeBasedFileNamingAndTriggeringPolicy> 
<!-- keep 30 log files worth of history --> 
<maxHistory>30</maxHistory> 
</rollingPolicy>

Ref: https://logback.qos.ch/manual/appenders.html

Re: Nifi 1.2.0 on Windows 2012 Server is not rolling over its log files.

ajviradia — Sat, 24 Jun 2017 02:14:51 GMT

Thanks Shashank, logs are now rolling over on both time and size triggers. Awesome!