tmp files after "Run Migrator pulling changelogs from a .WAR file"

General Discussion
1
Hi all,

I'm using

Run Migrator pulling changelogs from a .WAR file

java -jar liquibase.jar \
--driver=oracle.jdbc.OracleDriver \
--classpath=website.war \
--changeLogFile=com/example/db.changelog.xml \
--url=jdbc:oracle:thin:@localhost:1521:oracle \
--username=scott \
--password=tiger \
update

and I can see this logs:
INFO 11/21/18 12:54 PM: liquibase: adding 'jar:file:/tmp/liquibase.tmp7700727174965420685.tmp!/' to classpath
INFO 11/21/18 12:54 PM: liquibase: adding 'jar:file:/tmp/liquibase.tmp6452496865871492534.tmp!/' to classpath
INFO 11/21/18 12:54 PM: liquibase: adding 'jar:file:/tmp/liquibase.tmp4023308518781064752.tmp!/' to classpath
INFO 11/21/18 12:54 PM: liquibase: adding 'jar:file:/tmp/liquibase.tmp8499956868201722408.tmp!/' to classpath
INFO 11/21/18 12:54 PM: liquibase: adding 'jar:file:/tmp/liquibase.tmp7185863074002000436.tmp!/' to classpath
and indeed all these tmp files are created, but not removed (?)

so I'm wondering is there a way to clean all these tmp files? or what other options need to be specified?

liquibase version is 3.5.3

thanks in advance.