[logback-user] logback SiftingAppender generated log files cannot be deleted untill stop the tomcat server

[mayuran satchithanantham]

Hi logback geeks,

We are using logback "SiftingAppender" for generating the log files based
on the date and other information such as cycle(Each date can have multiple
cycles).

Following are the sample logging file names

20150515_1_Job1.log
20150515_2_Job1.log

For the above scenario we are using the following logback configuration.

<appender name="BATCH_LOGGER_APPENDER"
class="ch.qos.logback.classic.sift.SiftingAppender"> <discriminator>
<key>batchLoggerFileName</key> <defaultValue>unknown</defaultValue>
</discriminator> <sift> <appender class="ch.qos.logback.core.FileAppender">
<file>${batchlog.dir}/${batchLoggerFileName}.log</file> <layout
class="ch.qos.logback.classic.PatternLayout">
<pattern>%d{yyyy-MM-dd_HH:mm:ss.SSS} | %-5level | [%thread] |
%msg%n%rEx</pattern> </layout> </appender> </sift> </appender> <logger
name="BATCH_LOGGER" level="INFO" additivity="false"> <appender-ref
ref="BATCH_LOGGER_APPENDER"></appender-ref> </logger>

Following is the java code for logging the details to the specific logs
files.

private static final Logger BATCH_LOGGER = LoggerFactory
.getLogger("BATCH_LOGGER"); public void info(JobInfo jobInfo, String
message) { MDC.put("batchLoggerFileName", jobInfo.getJobId());
BATCH_LOGGER.info(message); MDC.remove("batchLoggerFileName"); }

We have some other jobs that do the housekeeping of the old log files with
the retention of 2 days(Two day old files will be moved to another
location).

But even after the job completes, we are not able to move the file. We
suspect that logback is holding the resource and not letting the file to
move or delete.

All the jobs are deployed in a single war file in apache tomcat 8 server.

Can anyone suggest how to enforce logback to release the resource after
logging is completed?

Regards,
Mayuran
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