When deleting large amount of RDF data stored in neo4j using n10s.rdf.delete.fetch method, the following error occurs.
com.google.common.cache.CacheLoader$InvalidCacheLoadException: CacheLoader returned null for key http://kisti.re.kr/resource/BJD_1111010700.
at com.google.common.cache.LocalCache$Segment.getAndRecordStats(LocalCache.java:2375)
at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2337)
at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2295)
at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2208)
at com.google.common.cache.LocalCache.get(LocalCache.java:4053)
CacheLoader says that it cannot find a key and return null, but when i search for that key in the neo4j, the data exists.