[iotdb] branch master updated: [IOTDB-6205] Pipe: Fixed null pointer exception (NPE) when getting historical pending queue size in metrics (#11374)

[rong]

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The following commit(s) were added to refs/heads/master by this push:
     new cebd62b6c36 [IOTDB-6205] Pipe: Fixed null pointer exception (NPE) when 
getting historical pending queue size in metrics (#11374)
cebd62b6c36 is described below

commit cebd62b6c36f7376cc541549f8accc563c223287
Author: Caideyipi <87789683+caidey...@users.noreply.github.com>
AuthorDate: Tue Oct 24 18:58:56 2023 +0800

    [IOTDB-6205] Pipe: Fixed null pointer exception (NPE) when getting 
historical pending queue size in metrics (#11374)
---
 .../extractor/historical/PipeHistoricalDataRegionTsFileExtractor.java   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git 
a/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/pipe/extractor/historical/PipeHistoricalDataRegionTsFileExtractor.java
 
b/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/pipe/extractor/historical/PipeHistoricalDataRegionTsFileExtractor.java
index 1bd362166d7..b250436622e 100644
--- 
a/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/pipe/extractor/historical/PipeHistoricalDataRegionTsFileExtractor.java
+++ 
b/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/pipe/extractor/historical/PipeHistoricalDataRegionTsFileExtractor.java
@@ -307,7 +307,7 @@ public class PipeHistoricalDataRegionTsFileExtractor 
implements PipeHistoricalDa
 
   @Override
   public int getPendingQueueSize() {
-    return pendingQueue.size();
+    return pendingQueue != null ? pendingQueue.size() : 0;
   }
 
   @Override