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https://issues.apache.org/jira/browse/LOG4J2-2101?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16245688#comment-16245688
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ASF GitHub Bot commented on LOG4J2-2101:
----------------------------------------
Github user cakofony commented on a diff in the pull request:
https://github.com/apache/logging-log4j2/pull/124#discussion_r149968256
--- Diff:
log4j-api/src/main/java/org/apache/logging/log4j/message/MapMessage.java ---
@@ -200,7 +200,7 @@ public void put(final String key, final String value) {
* @param map The Map to add.
*/
public void putAll(final Map<String, String> map) {
--- End diff --
perhaps this should take `Map<String, V>` instead. I'd prefer to make that
change separately though
> non-string value MapMessage ClassCastException
> ----------------------------------------------
>
> Key: LOG4J2-2101
> URL: https://issues.apache.org/jira/browse/LOG4J2-2101
> Project: Log4j 2
> Issue Type: Bug
> Components: Filters
> Affects Versions: 2.9.1
> Reporter: Carter Douglas Kozak
>
> Using a MapFilter with a MapMessage containing non-string values results in a
> ClassCastException attempting to cast values to strings.
> {noformat}
> ClassCastException: java.lang.Long cannot be cast to java.lang.String
> at org.apache.logging.log4j.message.MapMessage.get(MapMessage.java:214)
> at
> org.apache.logging.log4j.core.filter.MapFilter.filter(MapFilter.java:87)
> at
> org.apache.logging.log4j.core.filter.MapFilter.filter(MapFilter.java:79)
> at
> org.apache.logging.log4j.core.filter.AbstractFilterable.isFiltered(AbstractFilterable.java:182)
> at
> org.apache.logging.log4j.core.config.AppenderControl.isFilteredByAppender(AppenderControl.java:151)
> at
> org.apache.logging.log4j.core.config.AppenderControl.callAppender0(AppenderControl.java:128)
> {noformat}
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