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https://issues.apache.org/jira/browse/KYLIN-3633?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16659460#comment-16659460
]
ASF GitHub Bot commented on KYLIN-3633:
---------------------------------------
shaofengshi commented on a change in pull request #301: KYLIN-3633 Avoid
potential dead lock when building global dictionary
URL: https://github.com/apache/kylin/pull/301#discussion_r227015785
##########
File path:
core-dictionary/src/main/java/org/apache/kylin/dict/DictionaryGenerator.java
##########
@@ -75,13 +75,19 @@ public static IDictionaryBuilder
newDictionaryBuilder(DataType dataType) {
builder.init(dictInfo, baseId, null);
// add values
- while (valueEnumerator.moveNext()) {
- String value = valueEnumerator.current();
+ try {
+ while (valueEnumerator.moveNext()) {
+ String value = valueEnumerator.current();
- boolean accept = builder.addValue(value);
+ boolean accept = builder.addValue(value);
- if (accept && samples.size() < nSamples && samples.contains(value)
== false)
- samples.add(value);
+ if (accept && samples.size() < nSamples &&
samples.contains(value) == false)
+ samples.add(value);
+ }
+ } catch (Throwable e) {
Review comment:
Use "Throwable" is not recommended; please use a concrete exception type
instead.
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> Dead lock may happen in building global dictionary
> --------------------------------------------------
>
> Key: KYLIN-3633
> URL: https://issues.apache.org/jira/browse/KYLIN-3633
> Project: Kylin
> Issue Type: Bug
> Components: Measure - Count Distinct
> Affects Versions: v2.4.1
> Reporter: nichunen
> Assignee: nichunen
> Priority: Major
>
> During the building of global dict, if an error happens, the builder's lock
> maybe un-released. This will block all other building jobs with global dict.
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