in src/main/java/com/googlesource/gerrit/plugins/websession/flatfile/FlatFileWebSessionCacheCleaner.java [49:59]
public void run() {
log.atInfo().log("Cleaning up expired file based websessions...");
try {
flatFileWebSessionCache.cleanUp();
} catch (Exception e) {
// log and do not prevent subsequent scheduled tasks from running
// see https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/ScheduledThreadPoolExecutor.html#scheduleAtFixedRate(java.lang.Runnable,%20long,%20long,%20java.util.concurrent.TimeUnit)
log.atSevere().withCause(e).log("Exception during cleaning sessions");
}
log.atInfo().log("Cleaning up expired file based websessions...Done");
}