Fix race condition in ClockSeqAndNodeContainer

jasonk000 · absurdfarce · commit 27e2bfa85d7a · 2026-03-06T15:26:40.000-06:00
patch by Jason Koch; reviewed by Lukasz Antoniak and Bret McGuire reference: #2050
diff --git a/core/src/main/java/com/datastax/oss/driver/api/core/uuid/Uuids.java b/core/src/main/java/com/datastax/oss/driver/api/core/uuid/Uuids.java
@@ -141,9 +141,8 @@ private long get() {
       if (!initialized) {
         synchronized (ClockSeqAndNodeContainer.class) {
           if (!initialized) {
-
-            initialized = true;
             val = makeClockSeqAndNode();
+            initialized = true;
           }
         }
       }

Original file line number	Diff line number	Diff line change
`@@ -141,9 +141,8 @@ private long get() {`
`141`	`141`	`if (!initialized) {`
`142`	`142`	`synchronized (ClockSeqAndNodeContainer.class) {`
`143`	`143`	`if (!initialized) {`
`144`		`-`
`145`		`- initialized = true;`
`146`	`144`	`val = makeClockSeqAndNode();`
	`145`	`+ initialized = true;`
`147`	`146`	`}`
`148`	`147`	`}`
`149`	`148`	`}`