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Posted to issues@hbase.apache.org by GitBox <gi...@apache.org> on 2021/01/13 09:14:53 UTC

[GitHub] [hbase] virajjasani commented on a change in pull request #2762: HBASE-25329 Dump region hashes in logs for the regions that are stuck in transition for more than a configured amount of time

virajjasani commented on a change in pull request #2762:
URL: https://github.com/apache/hbase/pull/2762#discussion_r556369037



##########
File path: hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
##########
@@ -3538,18 +3538,31 @@ public void updateRegionsInTransitionMetrics() {
     int totalRITs = 0;
     int totalRITsOverThreshold = 0;
     long oldestRITTime = 0;
+    HashMap<String, RegionState> ritsOverThreshold = null;
     int ritThreshold = this.server.getConfiguration().
       getInt(HConstants.METRICS_RIT_STUCK_WARNING_THRESHOLD, 60000);
     for (RegionState state: regionStates.getRegionsInTransition()) {
       totalRITs++;
       long ritTime = currentTime - state.getStamp();
       if (ritTime > ritThreshold) { // more than the threshold
         totalRITsOverThreshold++;
+        if (ritsOverThreshold == null) {
+          ritsOverThreshold = new HashMap<String, RegionState>();
+        }
+        ritsOverThreshold.put(state.getRegion().getEncodedName(), state);
       }
       if (oldestRITTime < ritTime) {
         oldestRITTime = ritTime;
       }
     }
+    if (LOG.isDebugEnabled() && ritsOverThreshold != null && !ritsOverThreshold.isEmpty()) {
+      StringBuilder sb = new StringBuilder();
+      for (String regionName: ritsOverThreshold.keySet()) {
+        sb.append(regionName + ":" + ritsOverThreshold.get(regionName).getState().name() + "\n");
+      }
+      sb.delete(sb.length()-2, sb.length());

Review comment:
       Do we want to remove last appended new line char? If so, start index should be `sb.length()-1` right?

##########
File path: hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
##########
@@ -3538,18 +3538,31 @@ public void updateRegionsInTransitionMetrics() {
     int totalRITs = 0;
     int totalRITsOverThreshold = 0;
     long oldestRITTime = 0;
+    HashMap<String, RegionState> ritsOverThreshold = null;
     int ritThreshold = this.server.getConfiguration().
       getInt(HConstants.METRICS_RIT_STUCK_WARNING_THRESHOLD, 60000);
     for (RegionState state: regionStates.getRegionsInTransition()) {
       totalRITs++;
       long ritTime = currentTime - state.getStamp();
       if (ritTime > ritThreshold) { // more than the threshold
         totalRITsOverThreshold++;
+        if (ritsOverThreshold == null) {
+          ritsOverThreshold = new HashMap<String, RegionState>();
+        }
+        ritsOverThreshold.put(state.getRegion().getEncodedName(), state);
       }
       if (oldestRITTime < ritTime) {
         oldestRITTime = ritTime;
       }
     }
+    if (LOG.isDebugEnabled() && ritsOverThreshold != null && !ritsOverThreshold.isEmpty()) {
+      StringBuilder sb = new StringBuilder();
+      for (String regionName: ritsOverThreshold.keySet()) {
+        sb.append(regionName + ":" + ritsOverThreshold.get(regionName).getState().name() + "\n");

Review comment:
       nit: use chain of append() to cover String concatenation?
   ```
           sb.append(regionName).append(":")
             .append(ritsOverThreshold.get(regionName).getState().name()).append("\n");
   ```

##########
File path: hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
##########
@@ -3538,18 +3538,31 @@ public void updateRegionsInTransitionMetrics() {
     int totalRITs = 0;
     int totalRITsOverThreshold = 0;
     long oldestRITTime = 0;
+    HashMap<String, RegionState> ritsOverThreshold = null;
     int ritThreshold = this.server.getConfiguration().
       getInt(HConstants.METRICS_RIT_STUCK_WARNING_THRESHOLD, 60000);
     for (RegionState state: regionStates.getRegionsInTransition()) {
       totalRITs++;
       long ritTime = currentTime - state.getStamp();
       if (ritTime > ritThreshold) { // more than the threshold
         totalRITsOverThreshold++;
+        if (ritsOverThreshold == null) {
+          ritsOverThreshold = new HashMap<String, RegionState>();

Review comment:
       nit: `new HashMap<>()`




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