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Special thanks to Michael Young for the help to be my mentor.

Step1:

cd /opt/lucidworks-hdpsearch/solr/server/solr/configsets/data_driven_schema_configs/conf/

screen-shot-2016-11-21-at-100524-am.png

Step2:

vi managed-schema: add these 3 lines

<field name="_timestamp_" type="date" indexed="true" stored="true" multiValued="false" />

<field name="_ttl_" type="string" indexed="true" multiValued="false" stored="true" />

<field name="_expire_at_" type="date" multiValued="false" indexed="true" stored="true" />

screen-shot-2016-11-21-at-100929-am.png

Step3:

vi solrconfig.xml on the same directory.

Replace the below 3 lines with the lines after it:

<updateRequestProcessorChain name="add-unknown-fields-to-the-schema">

<!-- UUIDUpdateProcessorFactory will generate an id if none is present in the incoming document -->

<processor />

as

<updateRequestProcessorChain name="add-unknown-fields-to-the-schema">

<processor>

<str name="fieldName">_timestamp_</str>

</processor>

<processor>

<str name="fieldName">_ttl_</str>

<str name="value">+30SECONDS</str>

</processor>

<processor class="solr.processor.DocExpirationUpdateProcessorFactory">

<str name="ttlFieldName">_ttl_</str>

<str name="ttlParamName">_ttl_</str>

<int name="autoDeletePeriodSeconds">30</int>

<str name="expirationFieldName">_expire_at_</str>

</processor>

<processor>

<str name="fieldName">_expire_at_</str>

</processor>

<!-- UUIDUpdateProcessorFactory will generate an id if none is present in the incoming document -->

<processor class="solr.UUIDUpdateProcessorFactory" />

screen-shot-2016-11-21-at-101045-am.png

Hope that helps.

Thanks,

Sujitha

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