[ISSUE #6250] Fix wrong value of MessageStoreConfig#storePathEpochFile

1. fix wrong value of MessageStoreConfig#storePathEpochFile

Author: TheR1sing3un

store/src/main/java/org/apache/rocketmq/store/config/MessageStoreConfig.java

@@ -17,6 +17,7 @@
 package org.apache.rocketmq.store.config;
 
 import java.io.File;
+
 import org.apache.rocketmq.common.annotation.ImportantField;
 import org.apache.rocketmq.store.ConsumeQueue;
 import org.apache.rocketmq.store.queue.BatchConsumeQueue;
@@ -38,8 +39,7 @@ public class MessageStoreConfig {
 
     //The directory in which the epochFile is kept
     @ImportantField
-    private String storePathEpochFile = System.getProperty("user.home") + File.separator + "store"
-        + File.separator + "epochFileCheckpoint";
+    private String storePathEpochFile = null;
 
     private String readOnlyCommitLogStorePaths = null;
 
@@ -81,8 +81,8 @@ public class MessageStoreConfig {
     /**
      * 1. Register to broker after (startTime + disappearTimeAfterStart)
      * 2. Internal msg exchange will start after (startTime + disappearTimeAfterStart)
-     *  A. PopReviveService
-     *  B. TimerDequeueGetService
+     * A. PopReviveService
+     * B. TimerDequeueGetService
      */
     @ImportantField
     private int disappearTimeAfterStart = -1;
@@ -627,6 +627,9 @@ public void setStorePathDLedgerCommitLog(String storePathDLedgerCommitLog) {
     }
 
     public String getStorePathEpochFile() {
+        if (storePathEpochFile == null) {
+            return storePathRootDir + File.separator + "epochFileCheckpoint";
+        }
         return storePathEpochFile;
     }
 
@@ -1067,6 +1070,7 @@ public String getReadOnlyCommitLogStorePaths() {
     public void setReadOnlyCommitLogStorePaths(String readOnlyCommitLogStorePaths) {
         this.readOnlyCommitLogStorePaths = readOnlyCommitLogStorePaths;
     }
+
     public String getdLegerGroup() {
         return dLegerGroup;
     }
@@ -1470,13 +1474,15 @@ public void setAsyncLearner(boolean asyncLearner) {
     public int getMappedFileSizeTimerLog() {
         return mappedFileSizeTimerLog;
     }
+
     public void setMappedFileSizeTimerLog(final int mappedFileSizeTimerLog) {
         this.mappedFileSizeTimerLog = mappedFileSizeTimerLog;
     }
 
     public int getTimerPrecisionMs() {
         return timerPrecisionMs;
     }
+
     public void setTimerPrecisionMs(int timerPrecisionMs) {
         int[] candidates = {100, 200, 500, 1000};
         for (int i = 1; i < candidates.length; i++) {
@@ -1487,9 +1493,11 @@ public void setTimerPrecisionMs(int timerPrecisionMs) {
         }
         this.timerPrecisionMs = candidates[candidates.length - 1];
     }
+
     public int getTimerRollWindowSlot() {
         return timerRollWindowSlot;
     }
+
     public int getTimerGetMessageThreadNum() {
         return timerGetMessageThreadNum;
     }
@@ -1501,9 +1509,11 @@ public void setTimerGetMessageThreadNum(int timerGetMessageThreadNum) {
     public int getTimerPutMessageThreadNum() {
         return timerPutMessageThreadNum;
     }
+
     public void setTimerPutMessageThreadNum(int timerPutMessageThreadNum) {
         this.timerPutMessageThreadNum = timerPutMessageThreadNum;
     }
+
     public boolean isTimerEnableDisruptor() {
         return timerEnableDisruptor;
     }
@@ -1515,12 +1525,15 @@ public boolean isTimerEnableCheckMetrics() {
     public void setTimerEnableCheckMetrics(boolean timerEnableCheckMetrics) {
         this.timerEnableCheckMetrics = timerEnableCheckMetrics;
     }
+
     public boolean isTimerStopEnqueue() {
         return timerStopEnqueue;
     }
+
     public void setTimerStopEnqueue(boolean timerStopEnqueue) {
         this.timerStopEnqueue = timerStopEnqueue;
     }
+
     public String getTimerCheckMetricsWhen() {
         return timerCheckMetricsWhen;
     }
@@ -1533,9 +1546,10 @@ public boolean isTimerWarmEnable() {
         return timerWarmEnable;
     }
 
-    public  boolean isTimerWheelEnable() {
+    public boolean isTimerWheelEnable() {
         return timerWheelEnable;
     }
+
     public void setTimerWheelEnable(boolean timerWheelEnable) {
         this.timerWheelEnable = timerWheelEnable;
     }
@@ -1555,20 +1569,24 @@ public void setTimerMetricSmallThreshold(int timerMetricSmallThreshold) {
     public int getTimerCongestNumEachSlot() {
         return timerCongestNumEachSlot;
     }
+
     public void setTimerCongestNumEachSlot(int timerCongestNumEachSlot) {
         // In order to get this value from messageStoreConfig properties file created before v4.4.1.
         this.timerCongestNumEachSlot = timerCongestNumEachSlot;
     }
+
     public int getTimerFlushIntervalMs() {
         return timerFlushIntervalMs;
     }
 
     public void setTimerFlushIntervalMs(final int timerFlushIntervalMs) {
         this.timerFlushIntervalMs = timerFlushIntervalMs;
     }
+
     public void setTimerRollWindowSlot(final int timerRollWindowSlot) {
         this.timerRollWindowSlot = timerRollWindowSlot;
     }
+
     public int getTimerProgressLogIntervalMs() {
         return timerProgressLogIntervalMs;
     }
@@ -1588,6 +1606,7 @@ public void setTimerInterceptDelayLevel(boolean timerInterceptDelayLevel) {
     public int getTimerMaxDelaySec() {
         return timerMaxDelaySec;
     }
+
     public void setTimerMaxDelaySec(final int timerMaxDelaySec) {
         this.timerMaxDelaySec = timerMaxDelaySec;
     }