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<oembed><type>rich</type><version>1.0</version><provider_name>phorkie</provider_name><provider_url>https://p.cweiske.de/</provider_url><title>elasticsearch: upgrade from version 2 to 6</title><author_name>Christian Weiske</author_name><cache_age>86400</cache_age><width>900</width><height>900</height><html>&lt;!-- embedding all files of https://p.cweiske.de/590 --&gt;
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&lt;dl class="docutils"&gt;
&lt;dt&gt;Content-Type header [application/x-www-form-urlencoded] is not supported&lt;/dt&gt;
&lt;dd&gt;&lt;a class="reference external" href="https://www.elastic.co/blog/strict-content-type-checking-for-elasticsearch-rest-requests"&gt;https://www.elastic.co/blog/strict-content-type-checking-for-elasticsearch-rest-requests&lt;/a&gt;&lt;/dd&gt;
&lt;dt&gt;No handler for type [string] declared on field [h1]&lt;/dt&gt;
&lt;dd&gt;&lt;a class="reference external" href="https://stackoverflow.com/questions/47452770/no-handler-for-type-string-declared-on-field-name"&gt;https://stackoverflow.com/questions/47452770/no-handler-for-type-string-declared-on-field-name&lt;/a&gt;&lt;/dd&gt;
&lt;dt&gt;Could not convert [language.index] to boolean&lt;/dt&gt;
&lt;dd&gt;&lt;a class="reference external" href="https://www.elastic.co/blog/strings-are-dead-long-live-strings"&gt;https://www.elastic.co/blog/strings-are-dead-long-live-strings&lt;/a&gt;
&lt;a class="reference external" href="https://www.elastic.co/guide/en/elasticsearch/reference/5.0/breaking_50_mapping_changes.html"&gt;https://www.elastic.co/guide/en/elasticsearch/reference/5.0/breaking_50_mapping_changes.html&lt;/a&gt;&lt;/dd&gt;
&lt;dt&gt;pre_tags are set but post_tags are not set&lt;/dt&gt;
&lt;dd&gt;add the post_tags field&lt;/dd&gt;
&lt;dt&gt;Fielddata is disabled on text fields by default. Set fielddata=true on [tags] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead.&lt;/dt&gt;
&lt;dd&gt;change from string to keyword&lt;/dd&gt;
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