[Elasticsearch] NumberFormatException / Invalid shift value in prefixCoded bytes

Elasticsearch NumberFormatException

ElasticsearchException[java.lang.NumberFormatException: Invalid shift value in prefixCoded bytes (is encoded value really an INT?)]; nested: UncheckedExecutionException[java.lang.NumberFormatException: Invalid shift value in prefixCoded bytes (is encoded value really an INT?)]; nested: NumberFormatException[Invalid shift value in prefixCoded bytes (is encoded value really an INT?)]

在使用 Elasticsearch 做 aggregation , facet ,或者是 sort 時，相同名稱的 field 有不一樣的 data types 在同一個index內就會發生這樣的 exception。
所有的types 在 Elasticsearch 底層操作中都會被轉成 Lucene Document的形式，這樣構成了 elasticsearch的typeless 特點。

總結一句，就是在對同一個index做需要把欄位的值拿出來轉換時，發生了 NumberFormatException，可能是index內該欄位的資料 type 並不相同，也無法轉型成功。

所以，當發生這樣的問題時，請先確認index內該欄位的資料是否都是同樣的type。


補上 shay.banon 的說明

Sep 20, 2010; 3:19am Re: Number Format Exception?
kimchy
Administrator
6275 posts
Ahh, yes, this is a limitation in elasticsearch. Basically, all types are broken down into Lucene Documents, with their "typeness" added by elasticsearch. The limit to that is the fact that a field with the same name across different types *within the same index* must be of the same type (long/integer/string). The problem does not exists between indices.

Sorry about that!,
-shay.banon

ElasticSearch Users - Number Format Exception?
http://elasticsearch-users.115913.n3.nabble.com/Number-Format-Exception-td1474946.html

cf.
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