[iotdb] branch master updated: [IOTDB-3327] Fix data region is created twice (#6136)

[qiaojialin]

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qiaojialin pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/iotdb.git


The following commit(s) were added to refs/heads/master by this push:
     new eff66ef3a3 [IOTDB-3327] Fix data region is created twice (#6136)
eff66ef3a3 is described below

commit eff66ef3a3739da432af15933bc3cdea212ef49d
Author: Liu Xuxin <37140360+thumark...@users.noreply.github.com>
AuthorDate: Wed Jun 1 23:24:34 2022 +0800

    [IOTDB-3327] Fix data region is created twice (#6136)
---
 .../org/apache/iotdb/db/engine/StorageEngineV2.java    | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git 
a/server/src/main/java/org/apache/iotdb/db/engine/StorageEngineV2.java 
b/server/src/main/java/org/apache/iotdb/db/engine/StorageEngineV2.java
index a3fc388024..7f7aa5ee80 100644
--- a/server/src/main/java/org/apache/iotdb/db/engine/StorageEngineV2.java
+++ b/server/src/main/java/org/apache/iotdb/db/engine/StorageEngineV2.java
@@ -79,6 +79,7 @@ import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicReference;
 
 public class StorageEngineV2 implements IService {
   private static final Logger logger = 
LoggerFactory.getLogger(StorageEngineV2.class);
@@ -587,8 +588,21 @@ public class StorageEngineV2 implements IService {
   // the local engine before adding the corresponding consensusGroup to the 
consensus layer
   public DataRegion createDataRegion(DataRegionId regionId, String sg, long 
ttl)
       throws DataRegionException {
-    DataRegion dataRegion = buildNewDataRegion(sg, 
String.valueOf(regionId.getId()), ttl);
-    dataRegionMap.put(regionId, dataRegion);
+    AtomicReference<DataRegionException> exceptionAtomicReference = new 
AtomicReference<>(null);
+    DataRegion dataRegion =
+        dataRegionMap.computeIfAbsent(
+            regionId,
+            x -> {
+              try {
+                return buildNewDataRegion(sg, String.valueOf(x.getId()), ttl);
+              } catch (DataRegionException e) {
+                exceptionAtomicReference.set(e);
+              }
+              return null;
+            });
+    if (exceptionAtomicReference.get() != null) {
+      throw exceptionAtomicReference.get();
+    }
     return dataRegion;
   }