(iotdb) branch master updated: [RTO/RPO] Fix: NullPointer in ClusterTopology #15347

[tanxinyu]

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tanxinyu 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 88095bc2e52 [RTO/RPO] Fix: NullPointer in ClusterTopology #15347
88095bc2e52 is described below

commit 88095bc2e520a707a877eb96880a9e23786a249f
Author: William Song <48054931+szywill...@users.noreply.github.com>
AuthorDate: Wed Apr 16 15:54:51 2025 +0800

    [RTO/RPO] Fix: NullPointer in ClusterTopology #15347
---
 .../java/org/apache/iotdb/db/queryengine/plan/ClusterTopology.java    | 4 ++++
 1 file changed, 4 insertions(+)

diff --git 
a/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/ClusterTopology.java
 
b/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/ClusterTopology.java
index 2357a5f50f1..57128834963 100644
--- 
a/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/ClusterTopology.java
+++ 
b/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/ClusterTopology.java
@@ -89,6 +89,10 @@ public class ClusterTopology {
     if (!isPartitioned.get() || all == null || all.isEmpty()) {
       return all;
     }
+    if (all.stream().anyMatch(set -> set.getDataNodeLocationsSize() == 0)) {
+      // some TRegionReplicaSet is unreachable since all DataNodes are down
+      return Collections.emptyList();
+    }
     final Map<Integer, Set<Integer>> topologyMapCurrent =
         Collections.unmodifiableMap(this.topologyMap.get());