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[209.85.213.54]) by smtp.gmail.com with ESMTPSA id s17sm12744959vka.26.2016.10.17.15.43.29 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 17 Oct 2016 15:43:29 -0700 (PDT) Received: by mail-vk0-f54.google.com with SMTP id q126so142667469vkd.2 for ; Mon, 17 Oct 2016 15:43:29 -0700 (PDT) X-Received: by 10.31.124.12 with SMTP id x12mr17820536vkc.122.1476744209224; Mon, 17 Oct 2016 15:43:29 -0700 (PDT) MIME-Version: 1.0 Received: by 10.103.64.68 with HTTP; Mon, 17 Oct 2016 15:43:28 -0700 (PDT) From: Trejkaz Date: Tue, 18 Oct 2016 09:43:28 +1100 X-Gmail-Original-Message-ID: Message-ID: Subject: What does "found existing value for PerFieldPostingsFormat.format" mean? To: Lucene Users Mailing List Content-Type: text/plain; charset=UTF-8 archived-at: Mon, 17 Oct 2016 22:43:36 -0000 Hi all. Does anyone know what this error message means? found existing value for PerFieldPostingsFormat.format, field=path-position, old=Lucene50, new=Lucene50 java.lang.IllegalStateException: found existing value for PerFieldPostingsFormat.format, field=path-position, old=Lucene50, new=Lucene50 at org.apache.lucene.codecs.perfield.PerFieldPostingsFormat$FieldsWriter.write(PerFieldPostingsFormat.java:170) at org.apache.lucene.codecs.FieldsConsumer.merge(FieldsConsumer.java:105) at org.apache.lucene.index.SegmentMerger.mergeTerms(SegmentMerger.java:193) at org.apache.lucene.index.SegmentMerger.merge(SegmentMerger.java:95) at org.apache.lucene.index.IndexWriter.addIndexes(IndexWriter.java:2629) We're doing fancy migrations which perform index changes by overriding FilterCodecReader and copying into a new index, but in this particular case the migration is only *deleting* values from the index, so it seems odd that I'd get this particular error. 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