ShubhamChaurasia commented on a change in pull request #669: HIVE-21864:
LlapBaseInputFormat#closeAll() throws ConcurrentModificationException
URL: https://github.com/apache/hive/pull/669#discussion_r292904914
##########
File path:
llap-ext-client/src/java/org/apache/hadoop/hive/llap/LlapBaseInputFormat.java
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@@ -345,8 +346,11 @@ public static void close(String handleId) throws
IOException {
*/
public static void closeAll() {
LOG.debug("Closing all handles");
- for (String handleId : connectionMap.keySet()) {
+ Iterator<String> handleIds = connectionMap.keySet().iterator();
+ String handleId = null;
+ while (handleIds.hasNext()) {
try {
+ handleId = handleIds.next();
Review comment:
Thanks Ashutosh, good catch.
I just realized, even without doing all these changes we can avoid it by
just changing the original code `for (String handleId :
connectionMap.keySet())`
to `for (String handleId : new ArrayList<>(connectionMap.keySet()))`
Looks good?
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