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From Zheng Lin Edwin Yeo <>
Subject RegexReplaceProcessorFactory pattern to detect multiple \n
Date Thu, 07 Feb 2019 13:08:15 GMT

I am trying to use the RegexReplaceProcessorFactory to remove more than two
\n with any number of spaces between them (Eg: \n\n, \n \n, \n \n  \n \n),
and replace it with two <br>.

I use the following regex pattern and it is working when I test it in But it is not working when I put it inside the
RegexReplaceProcessorFactory as below:

<updateRequestProcessorChain name="removeCode">
<processor class="solr.RegexReplaceProcessorFactory">
   <str name="fieldName">content</str>
   <str name="pattern">"(\\n\s*){2,}"</str>
   <str name="replacement">&lt;br&gt;&lt;br&gt;</str>

To explain further about my regex pattern, \s* is instructing the regex to
match any \n that have space after and {2,} is instructing the regex to
match 2 or more occurrence of such pattern (\n).

Please kindly let me know what is wrong and how should I do it?

I am using Solr 7.6.0.


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