Hi
This is the summary of my work with SOLR-Dovecot, in my QUEST TO REPRODUCE THE PREVIOULSY EXCELLENT WORK OF FTS_SQUAT
@Aki : Based on the time I have spent on this, I would love to see you updating the Wiki with those improvements, and adding my name somewhere
@All : Hope it helps
- INSTALLATION:
-> Create a clean install using the default, (at least in the Archlinux package), and do a "sudo -u solr solr create -c dovecot ". The config files are then in /opt/solr/server/solr/dovecot/conf and datafiles in /opt/solr/server/solr/dovecot/data
-> In /opt/solr/server/solr/dovecot/conf/solrconfig.xml:
* around line 313, change <openSearcher>false</openSearcher> to<openSearcher>true</openSearcher>
* around line 147, set <writeLockTimeout>2000</writeLockTimeout>(or above)
* around line 1127, before <updateProcessorclass="solr.UUIDUpdateProcessorFactory" name="uuid"/>, add <schemaFactory class="ClassicIndexSchemaFactory"></schemaFactory>
* around line 1161, delete the whole <updateProcessorclass="solr.AddSchemaFieldsUpdateProcessorFactory" name="add-schema-fields">
* around line 1192, remove the whole <updateRequestProcessorChainname="add-unknown-fields-to-the-schema" ... />
-> Remove /opt/solr/server/solr/dovecot/conf/managed-schema
-> Change "schema.xml" by the one below to reproduce fts_squat behavior (equivalent to " fts_squat = partial=3 full=25" in dovecot.conf) (note : such a huge trouble to replace a single line setup, anyway...)
-> Move /opt/solr/server/solr (or the subfolder data) to a partition with *space*, ideally ext4 or faster file system (it looks like Solr is not considering using a simple mysql database, which would make sense to avoid all the fuzz and let it transit to a non-java state, but that is another story)
-> Config of dovecot.conf is as below
-> The systemd unit shall specify high ulimit for files and proc (see below)
-> Increase the memory available for the JavaVM (I put 12Gb as I have quite a space on my server, but you may adapt it as per your specs) : in /opt/solr/bin/solr.in.sh, set SOLR_HEAP="12288m"
-> As Solr is complaining a lot, you may consider a filter for it in your syslog-ng or journald as it pollutes greatly your audit files
-> (re)Start solr (first) and dovecot by systemctl
-> Launch redindex ( doveadm fts rescan -u <username> )
-> wait for a big while to let the system re-index all your mail boxes
- BUGS SO FAR
-> Line 620 of fts_solr dovecot plugin : the size oof header is improperly calculated ("huge header" warning for a simple email, which kilss the index of that considered email, so basically MOST emails as the calculation is wrong)
-> The UID returned by SOlr is to be considered as a STRING (and that is maybe the source of problem of the "out of bound" errors in fts_solr dovecot, as "long" is not enough)
-> Java errors : A lot of non sense for me, I am not expert in Java. But, with increased memory, it seems not crashing, even if complaining quite a lot in the logs
-------SCHEMA.XML IN /OPT/SOLR/SERVER/SOLR/DOVECOT/CONF
<?xml version="1.0" encoding="UTF-8"?>
<schema name="dovecot" version="2.0"> <uniqueKey>id</uniqueKey> <fieldType name="dovecottext" class="solr.TextField" autoGeneratePhraseQueries="true" positionIncrementGap="100"> <analyzer type="index"> <tokenizer class="solr.ClassicTokenizerFactory"/> <filter class="solr.WordDelimiterGraphFilterFactory" catenateNumbers="1" generateNumberParts="1" splitOnCaseChange="1" generateWordParts="1" splitOnNumerics="1" catenateAll="1" catenateWords="1" preserveOriginal="1"/> <filter class="solr.FlattenGraphFilterFactory"/> <filter class="solr.LowerCaseFilterFactory"/> <filter class="solr.TrimFilterFactory"/> <filter class="solr.RemoveDuplicatesTokenFilterFactory"/> </analyzer> <analyzer type="query"> <tokenizer class="solr.KeywordTokenizerFactory"/> <filter class="solr.LowerCaseFilterFactory"/> <filter class="solr.TrimFilterFactory"/> <filter class="solr.RemoveDuplicatesTokenFilterFactory"/> </analyzer> </fieldType> <fieldType name="dovecotfield" class="solr.TextField" autoGeneratePhraseQueries="true"> <analyzer type="index"> <tokenizer class="solr.ClassicTokenizerFactory"/> <filter class="solr.NGramFilterFactory" minGramSize="3" maxGramSize="25"/> <filter class="solr.TrimFilterFactory"/> <filter class="solr.LowerCaseFilterFactory"/> <filter class="solr.RemoveDuplicatesTokenFilterFactory"/> </analyzer> <analyzer type="query"> <tokenizer class="solr.KeywordTokenizerFactory"/> <filter class="solr.LowerCaseFilterFactory"/> <filter class="solr.TrimFilterFactory"/> <filter class="solr.RemoveDuplicatesTokenFilterFactory"/> </analyzer> </fieldType>
<fieldType name="string" class="solr.StrField"/> <field name="_version_" type="string" indexed="true" stored="true"/> <field name="bcc" type="string" indexed="false" stored="false"/> <field name="body" type="dovecottext" indexed="true" stored="false"/> <field name="box" type="string" indexed="true" required="true" stored="true"/> <field name="cc" type="dovecotfield" indexed="true" stored="false"/> <field name="from" type="dovecotfield" indexed="true" stored="false"/> <field name="hdr" type="string" indexed="false" stored="false"/> <field name="id" type="string" indexed="true" required="true" stored="true"/> <field name="subject" type="dovecottext" indexed="true" stored="false"/> <field name="to" type="dovecotfield" indexed="true" stored="false"/> <field name="uid" type="string" indexed="true" required="true" stored="true"/> <field name="user" type="string" indexed="true" required="true" stored="true"/> </schema>
-- DOVECOT.CONF
mail_plugins = fts fts_solr
plugin { plugin = fts fts_solr managesieve sieve
fts = solr fts_autoindex = yes fts_enforced = yes fts_solr = url=http://127.0.0.1:8983/solr/dovecot/
(replace 127.0.0.1 by your solr server if you want to use an external server) (...)
}
-- /ETC/SYSTEMD/SYSTEM/MULTI-USER.TARGET.WANTS/SOLR.SERVICE
[Unit] Description=Solr full text search engine After=network.target
[Service] Type=simple User=solr Group=solr PrivateTmp=yes WorkingDirectory=/opt/solr LIMITNOFILE=65000 LIMITNPROC=65000 ExecStart=/opt/solr/bin/solr start -f
[Install] WantedBy=multi-user.target