Debug ITWikipediaQueryTest

[findingrish]

This test has been failing lately with following exception.

Error:  before(org.apache.druid.tests.query.ITWikipediaQueryTest)  Time elapsed: 182.3 s  <<< FAILURE!
org.apache.druid.java.util.common.ISE: Error while querying [http://127.0.0.1:8081/druid/coordinator/v1/lookups/config] status [500 Internal Server Error] content [{"error":"given update for lookup [__default]:[wiki-simple] can't replace existing spec [LookupExtractorFactoryContainer{version='v1', lookupExtractorFactory={type=cachedNamespace, extractionNamespace={type=uri, uri=file:/shared/wikiticker-it/wiki-simple-lookup.json, namespaceParseSpec={format=simpleJson}, pollPeriod=PT10S}, firstCacheTimeout=0}}]."}]
	at org.apache.druid.tests.query.ITWikipediaQueryTest.before(ITWikipediaQueryTest.java:78)

It seems that the historical is going out of memory causing this failure.

Trying to take historical heap dump when it goes out of memory.