尝试索引PDF时出现Elasticsearch Parse Exception错误

Question

我刚刚开始使用elasticsearch.我们的要求是我们需要索引数千个PDF文件,而我很难获得其中一个成功编制索引.

安装了Attachment Type插件并获得了响应:Installed mapper-attachments.

按照附件类型操作教程,但该过程挂起,我不知道如何解释错误消息.还尝试了挂在同一个地方的要点.

$ curl -X POST "localhost:9200/test/attachment/" -d json.file 
{"error":"ElasticSearchParseException[Failed to derive xcontent from (offset=0, length=9): [106, 115, 111, 110, 46, 102, 105, 108, 101]]","status":400}

更多细节:

该json.file包含一个嵌入式的Base64 PDF文件(按说明).该文件的第一行显示正确(无论如何):{"file":"JVBERi0xLjQNJeLjz9MNCjE1OCAwIG9iaiA8...

我不确定是否可能json.file是无效的,或者是否可能没有设置弹性搜索来正确解析PDF？!？

编码 - 以下是我们如何将PDF编码为json.file(根据教程):

coded=`cat fn6742.pdf | perl -MMIME::Base64 -ne 'print encode_base64($_)'`
json="{\"file\":\"${coded}\"}"
echo "$json" > json.file

还尝试过:

coded=`openssl base64 -in fn6742.pdf

日志:

[2012-06-07 12:32:16,742][DEBUG][action.index             ] [Bailey, Paul] [test][0], node[AHLHFKBWSsuPnTIRVhNcuw], [P], s[STARTED]: Failed to execute [index {[test][attachment][DauMB-vtTIaYGyKD4P8Y_w], source[json.file]}]
org.elasticsearch.ElasticSearchParseException: Failed to derive xcontent from (offset=0, length=9): [106, 115, 111, 110, 46, 102, 105, 108, 101]
    at org.elasticsearch.common.xcontent.XContentFactory.xContent(XContentFactory.java:147)
    at org.elasticsearch.common.xcontent.XContentHelper.createParser(XContentHelper.java:50)
    at org.elasticsearch.index.mapper.DocumentMapper.parse(DocumentMapper.java:451)
    at org.elasticsearch.index.mapper.DocumentMapper.parse(DocumentMapper.java:437)
    at org.elasticsearch.index.shard.service.InternalIndexShard.prepareCreate(InternalIndexShard.java:290)
    at org.elasticsearch.action.index.TransportIndexAction.shardOperationOnPrimary(TransportIndexAction.java:210)
    at org.elasticsearch.action.support.replication.TransportShardReplicationOperationAction$AsyncShardOperationAction.performOnPrimary(TransportShardReplicationOperationAction.java:532)
    at org.elasticsearch.action.support.replication.TransportShardReplicationOperationAction$AsyncShardOperationAction$1.run(TransportShardReplicationOperationAction.java:430)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:680)

希望有人可以帮我看看我错过了什么或做错了什么？

Answer 1

以下错误指向问题的根源.

Failed to derive xcontent from (offset=0, length=9): [106, 115, 111, 110, 46, 102, 105, 108, 101]

UTF-8代码[106,115,111,...]表明您正在尝试索引字符串"json.file"而不是文件的内容.

要索引文件的内容,只需在文件名前添加字母"@"即可.

curl -X POST "localhost:9200/test/attachment/" -d @json.file