saLeox commented on code in PR #4374:
URL: https://github.com/apache/zeppelin/pull/4374#discussion_r884708245
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zeppelin-zengine/src/main/java/org/apache/zeppelin/notebook/NoteManager.java:
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@@ -181,7 +182,9 @@ public void saveNote(Note note, AuthenticationInfo subject)
throws IOException {
} else {
addOrUpdateNoteNode(new NoteInfo(note));
noteCache.putNote(note);
- this.notebookRepo.save(note, subject);
+ synchronized (this) {
Review Comment:
The reason makes it `synchronized` is that the `note` object will be empty
in the case of concurrent saveNote, which comes from following code:
```note = notebookRepo.get(noteInfo.getId(), noteInfo.getPath(),
AuthenticationInfo.ANONYMOUS);``` (NoteManager#L616)
And since it's just an abstract function, I just add `synchronized` to make
it return non-empty object.
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