jixuan1989 commented on a change in pull request #2468:
URL: https://github.com/apache/iotdb/pull/2468#discussion_r579744172
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File path: server/src/main/java/org/apache/iotdb/db/metadata/MTree.java
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@@ -242,23 +242,33 @@ MeasurementMNode createTimeseries(
// synchronize check and add, we need addChild and add Alias become atomic
operation
// only write on mtree will be synchronized
synchronized (this) {
- if (cur.hasChild(leafName)) {
+ MNode child = cur.getChild(leafName);
+ if (child instanceof MeasurementMNode || child instanceof
StorageGroupMNode) {
throw new PathAlreadyExistException(path.getFullPath());
}
- if (alias != null && cur.hasChild(alias)) {
- throw new AliasAlreadyExistException(path.getFullPath(), alias);
+
+ if (alias != null) {
+ MNode childByAlias = cur.getChild(alias);
+ if (childByAlias instanceof MeasurementMNode) {
Review comment:
how to guarantee childByAlias != null
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