[BugFix] Fix rollback stream load npe when coord is null (StarRocks#5…

…0849)

Signed-off-by: meegoo <[email protected]>

fe/fe-core/src/main/java/com/starrocks/load/streamload/StreamLoadTask.java

@@ -1132,7 +1132,7 @@ public void afterAborted(TransactionState txnState, boolean txnOperated, String
             return;
         }
 
-        if (isSyncStreamLoad() && coord.isProfileAlreadyReported()) {
+        if (isSyncStreamLoad() && coord != null && coord.isProfileAlreadyReported()) {
             collectProfile(true);
         }