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add double checking lock for singleton

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This commit is contained in:
Jeff Zhang 2016-12-16 11:18:38 +08:00
parent 1cce1c6580
commit 92472f98be
1 changed files with 1 additions and 1 deletions
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2
zeppelin-zengine/src/main/java/org/apache/zeppelin/notebook/NotebookAuthorization.java
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@ -65,7 +65,7 @@ public class NotebookAuthorization {
private NotebookAuthorization() {}
public static NotebookAuthorization init(ZeppelinConfiguration config) {
public static synchronized NotebookAuthorization init(ZeppelinConfiguration config) {
if (instance == null) {
instance = new NotebookAuthorization();
conf = config;