order

This paper mainly studies the CleanCommitLogService of rocketmq

CleanCommitLogService

rocketmq-all-4.6.0-source-release/store/src/main/java/org/apache/rocketmq/store/DefaultMessageStore.java

    class CleanCommitLogService {

        private final static int MAX_MANUAL_DELETE_FILE_TIMES = 20;
        private final double diskSpaceWarningLevelRatio =
            Double.parseDouble(System.getProperty("rocketmq.broker.diskSpaceWarningLevelRatio", "0.90"));

        private final double diskSpaceCleanForciblyRatio =
            Double.parseDouble(System.getProperty("rocketmq.broker.diskSpaceCleanForciblyRatio", "0.85"));
        private long lastRedeleteTimestamp = 0;

        private volatile int manualDeleteFileSeveralTimes = 0;

        private volatile boolean cleanImmediately = false;

        public void excuteDeleteFilesManualy() {
            this.manualDeleteFileSeveralTimes = MAX_MANUAL_DELETE_FILE_TIMES;
            DefaultMessageStore.log.info("executeDeleteFilesManually was invoked");
        }

        public void run() {
            try {
                this.deleteExpiredFiles();

                this.redeleteHangedFile();
            } catch (Throwable e) {
                DefaultMessageStore.log.warn(this.getServiceName() + " service has exception. ", e);
            }
        }

        private void deleteExpiredFiles() {
            int deleteCount = 0;
            long fileReservedTime = DefaultMessageStore.this.getMessageStoreConfig().getFileReservedTime();
            int deletePhysicFilesInterval = DefaultMessageStore.this.getMessageStoreConfig().getDeleteCommitLogFilesInterval();
            int destroyMapedFileIntervalForcibly = DefaultMessageStore.this.getMessageStoreConfig().getDestroyMapedFileIntervalForcibly();

            boolean timeup = this.isTimeToDelete();
            boolean spacefull = this.isSpaceToDelete();
            boolean manualDelete = this.manualDeleteFileSeveralTimes > 0;

            if (timeup || spacefull || manualDelete) {

                if (manualDelete)
                    this.manualDeleteFileSeveralTimes--;

                boolean cleanAtOnce = DefaultMessageStore.this.getMessageStoreConfig().isCleanFileForciblyEnable() && this.cleanImmediately;

                log.info("begin to delete before {} hours file. timeup: {} spacefull: {} manualDeleteFileSeveralTimes: {} cleanAtOnce: {}",
                    fileReservedTime,
                    timeup,
                    spacefull,
                    manualDeleteFileSeveralTimes,
                    cleanAtOnce);

                fileReservedTime *= 60 * 60 * 1000;

                deleteCount = DefaultMessageStore.this.commitLog.deleteExpiredFile(fileReservedTime, deletePhysicFilesInterval,
                    destroyMapedFileIntervalForcibly, cleanAtOnce);
                if (deleteCount > 0) {
                } else if (spacefull) {
                    log.warn("disk space will be full soon, but delete file failed.");
                }
            }
        }

        private void redeleteHangedFile() {
            int interval = DefaultMessageStore.this.getMessageStoreConfig().getRedeleteHangedFileInterval();
            long currentTimestamp = System.currentTimeMillis();
            if ((currentTimestamp - this.lastRedeleteTimestamp) > interval) {
                this.lastRedeleteTimestamp = currentTimestamp;
                int destroyMapedFileIntervalForcibly =
                    DefaultMessageStore.this.getMessageStoreConfig().getDestroyMapedFileIntervalForcibly();
                if (DefaultMessageStore.this.commitLog.retryDeleteFirstFile(destroyMapedFileIntervalForcibly)) {
                }
            }
        }

        public String getServiceName() {
            return CleanCommitLogService.class.getSimpleName();
        }

        private boolean isTimeToDelete() {
            String when = DefaultMessageStore.this.getMessageStoreConfig().getDeleteWhen();
            if (UtilAll.isItTimeToDo(when)) {
                DefaultMessageStore.log.info("it's time to reclaim disk space, " + when);
                return true;
            }

            return false;
        }

        private boolean isSpaceToDelete() {
            double ratio = DefaultMessageStore.this.getMessageStoreConfig().getDiskMaxUsedSpaceRatio() / 100.0;

            cleanImmediately = false;

            {
                String storePathPhysic = DefaultMessageStore.this.getMessageStoreConfig().getStorePathCommitLog();
                double physicRatio = UtilAll.getDiskPartitionSpaceUsedPercent(storePathPhysic);
                if (physicRatio > diskSpaceWarningLevelRatio) {
                    boolean diskok = DefaultMessageStore.this.runningFlags.getAndMakeDiskFull();
                    if (diskok) {
                        DefaultMessageStore.log.error("physic disk maybe full soon " + physicRatio + ", so mark disk full");
                    }

                    cleanImmediately = true;
                } else if (physicRatio > diskSpaceCleanForciblyRatio) {
                    cleanImmediately = true;
                } else {
                    boolean diskok = DefaultMessageStore.this.runningFlags.getAndMakeDiskOK();
                    if (!diskok) {
                        DefaultMessageStore.log.info("physic disk space OK " + physicRatio + ", so mark disk ok");
                    }
                }

                if (physicRatio < 0 || physicRatio > ratio) {
                    DefaultMessageStore.log.info("physic disk maybe full soon, so reclaim space, " + physicRatio);
                    return true;
                }
            }

            {
                String storePathLogics = StorePathConfigHelper
                    .getStorePathConsumeQueue(DefaultMessageStore.this.getMessageStoreConfig().getStorePathRootDir());
                double logicsRatio = UtilAll.getDiskPartitionSpaceUsedPercent(storePathLogics);
                if (logicsRatio > diskSpaceWarningLevelRatio) {
                    boolean diskok = DefaultMessageStore.this.runningFlags.getAndMakeDiskFull();
                    if (diskok) {
                        DefaultMessageStore.log.error("logics disk maybe full soon " + logicsRatio + ", so mark disk full");
                    }

                    cleanImmediately = true;
                } else if (logicsRatio > diskSpaceCleanForciblyRatio) {
                    cleanImmediately = true;
                } else {
                    boolean diskok = DefaultMessageStore.this.runningFlags.getAndMakeDiskOK();
                    if (!diskok) {
                        DefaultMessageStore.log.info("logics disk space OK " + logicsRatio + ", so mark disk ok");
                    }
                }

                if (logicsRatio < 0 || logicsRatio > ratio) {
                    DefaultMessageStore.log.info("logics disk maybe full soon, so reclaim space, " + logicsRatio);
                    return true;
                }
            }

            return false;
        }

        public int getManualDeleteFileSeveralTimes() {
            return manualDeleteFileSeveralTimes;
        }

        public void setManualDeleteFileSeveralTimes(int manualDeleteFileSeveralTimes) {
            this.manualDeleteFileSeveralTimes = manualDeleteFileSeveralTimes;
        }
    }

• The run method of CleanCommitLogService will execute deleteExpiredFiles first, and then redeleteHangedFile; the deleteExpiredFiles method will execute commitLog.deleteExpiredFile when any of the three conditions isTimeToDelete, isSpaceToDelete, and manualDelete are true
• The redeleteHangedFile method will execute commitlog.retrydeletefirstfile (destroymapedfileintervalmandatory) when the (currenttimestamp - this. Lastredeletetimestamp) > interval condition is set
• isTimeToDelete method is judged by utilall.istimetodo (when); isSpaceToDelete is calculated by utilall.getdiskpartitionspaceusedpercent (storepathphysical), and runningFlags.getAndMakeDiskFull() is executed when physicRatio > diskSpaceWarningLevelRatio to change runningFlags status; if UtilAll.getDiskPartitionSpaceUsedPercent(storePathLogics) is greater than diskSpaceWarningLevelRatio will also execute runningFlags. Getandmakediskfull() to change the runningFlags status; both will execute runningFlags.getAndMakeDiskOK() when they are found to be lower than the execution ratio

DefaultMessageStore

ocketmq-all-4.6.0-source-release/store/src/main/java/org/apache/rocketmq/store/DefaultMessageStore.java

public class DefaultMessageStore implements MessageStore {

	//......

    private void addScheduleTask() {

        this.scheduledExecutorService.scheduleAtFixedRate(new Runnable() {
            @Override
            public void run() {
                DefaultMessageStore.this.cleanFilesPeriodically();
            }
        }, 1000 * 60, this.messageStoreConfig.getCleanResourceInterval(), TimeUnit.MILLISECONDS);

        this.scheduledExecutorService.scheduleAtFixedRate(new Runnable() {
            @Override
            public void run() {
                DefaultMessageStore.this.checkSelf();
            }
        }, 1, 10, TimeUnit.MINUTES);

        this.scheduledExecutorService.scheduleAtFixedRate(new Runnable() {
            @Override
            public void run() {
                if (DefaultMessageStore.this.getMessageStoreConfig().isDebugLockEnable()) {
                    try {
                        if (DefaultMessageStore.this.commitLog.getBeginTimeInLock() != 0) {
                            long lockTime = System.currentTimeMillis() - DefaultMessageStore.this.commitLog.getBeginTimeInLock();
                            if (lockTime > 1000 && lockTime < 10000000) {

                                String stack = UtilAll.jstack();
                                final String fileName = System.getProperty("user.home") + File.separator + "debug/lock/stack-"
                                    + DefaultMessageStore.this.commitLog.getBeginTimeInLock() + "-" + lockTime;
                                MixAll.string2FileNotSafe(stack, fileName);
                            }
                        }
                    } catch (Exception e) {
                    }
                }
            }
        }, 1, 1, TimeUnit.SECONDS);

        // this.scheduledExecutorService.scheduleAtFixedRate(new Runnable() {
        // @Override
        // public void run() {
        // DefaultMessageStore.this.cleanExpiredConsumerQueue();
        // }
        // }, 1, 1, TimeUnit.HOURS);
    }

    private void cleanFilesPeriodically() {
        this.cleanCommitLogService.run();
        this.cleanConsumeQueueService.run();
    }

	//......

}

• The addScheduleTask method registers a scheduled task and executes the cleanfilesperiodic() method every messageStoreConfig.getCleanResourceInterval() MS; the cleanfilesperiodic method executes the cleanCommitLogService.run() method and the cleanConsumeQueueService.run() method

Summary

The run method of CleanCommitLogService will execute deleteExpiredFiles first, and then redeleteHangedFile; the deleteExpiredFiles method will execute commitLog.deleteExpiredFile when any of the three conditions isTimeToDelete, isSpaceToDelete, and manualDelete are true

doc

• DefaultMessageStore