Hi Paul, Thank you for the reply.
I have tried to add the following configuration according to your suggestion: <processor class="solr.RegexReplaceProcessorFactory"> <str name="fieldName">content</str> <str name="pattern">[ \t]*\r?\n}</str> <str name="replacement"><br></str> <bool name="literalReplacement">true</bool> </processor> <processor class="solr.RegexReplaceProcessorFactory"> <str name="fieldName">content</str> <str name="pattern">(<br><br>){3,}</str> <str name="replacement"><br><br></str> <bool name="literalReplacement">true</bool> </processor> However, none of the \n is being removed this time round. Is the order and/or the pattern correct? Regards, Edwin On Tue, 5 Mar 2019 at 19:54, <paul.d...@ub.unibe.ch> wrote: > Hi Edwin > > > > Try for the first pattern/replacement > > > > <str name="pattern">[ \t]*\r?\n</str> > > <str name="replacement"><br></str> > > > > Now all line endings and preceding whitespace characters should be changed > to ‘<br>’. > > > > The second pattern replacement should replace 3 or more ‘<br>’ sequences > to 2 ‘<br>’ sequences: > > > > <str name="pattern">(<br><br>){3,}</str> > > <str name="replacement"><br><br></str> > > > > Hope this approach works. Sorry for not replying earlier and best regards, > > Paul > > > > > > Gesendet von Mail<https://go.microsoft.com/fwlink/?LinkId=550986> für > Windows 10 > > > > Von: Zheng Lin Edwin Yeo<mailto:edwinye...@gmail.com> > Gesendet: Dienstag, 5. März 2019 03:35 > An: solr-user@lucene.apache.org<mailto:solr-user@lucene.apache.org> > Betreff: Re: RegexReplaceProcessorFactory pattern to detect multiple \n > > > > Hi, > > For your info, this issue is occurring in the new Solr 7.7.1 as well. > > Regards, > Edwin > > On Mon, 25 Feb 2019 at 10:28, Zheng Lin Edwin Yeo <edwinye...@gmail.com> > wrote: > > > Hi, > > > > Anyone else has other suggestions or have faced the same problem? > > > > Regards, > > Edwin > > > > On Wed, 20 Feb 2019 at 16:58, Zheng Lin Edwin Yeo <edwinye...@gmail.com> > > wrote: > > > >> Hi Paul, > >> > >> If I tried to execute the second step first, then I will only get a > >> single <br> for those with 2 <br>. > >> For those that we originally get 4 <br>, there will be 2 <br> with a > >> space in between. > >> > >> This is just changing the 2 <br> to be a single <br>, since the second > >> step is to replace with a single <br>. > >> But it has not solved the underlying problem yet. > >> > >> Regards, > >> Edwin > >> > >> > >> On Wed, 20 Feb 2019 at 16:41, <paul.d...@ub.unibe.ch> wrote: > >> > >>> If the second step is executed first, then you will get the unwanted 4 > >>> <br> > >>> > >>> > >>> > >>> Gesendet von Mail<https://go.microsoft.com/fwlink/?LinkId=550986> für > >>> Windows 10 > >>> > >>> > >>> > >>> Von: Zheng Lin Edwin Yeo<mailto:edwinye...@gmail.com> > >>> Gesendet: Mittwoch, 20. Februar 2019 09:29 > >>> An: solr-user@lucene.apache.org<mailto:solr-user@lucene.apache.org> > >>> Betreff: Re: RegexReplaceProcessorFactory pattern to detect multiple \n > >>> > >>> > >>> > >>> Hi Jörn , > >>> > >>> Do you mean the regex is not correct? > >>> > >>> We are already using two RegexReplaceProcessorFactory steps, like the > one > >>> shown below. The output that we get is still the same. > >>> > >>> <processor class="solr.RegexReplaceProcessorFactory"> > >>> <str name="fieldName">content</str> > >>> <str name="pattern">([ \t]*\r?\n){2,}</str> > >>> <str name="replacement"><br><br></str> > >>> <bool name="literalReplacement">true</bool> > >>> <processor> > >>> > >>> <processor class="solr.RegexReplaceProcessorFactory"> > >>> <str name="fieldName">content</str> > >>> <str name="pattern">([ \t]*\r?\n){1,}</str> > >>> <str name="replacement"><br></str> > >>> <bool name="literalReplacement">true</bool> > >>> <processor> > >>> > >>> Regards, > >>> Edwin > >>> > >>> On Wed, 20 Feb 2019 at 16:03, Jörn Franke <jornfra...@gmail.com> > wrote: > >>> > >>> > Then you need two regexprocessfactory steps > >>> > > >>> > > Am 20.02.2019 um 08:12 schrieb Zheng Lin Edwin Yeo < > >>> edwinye...@gmail.com > >>> > >: > >>> > > > >>> > > Hi, > >>> > > > >>> > > Thanks for the reply. > >>> > > > >>> > > Do you know of any regex online tool that works correctly for Java > >>> regex? > >>> > > I tried to find some, but they are not working properly. > >>> > > > >>> > > Yes, our plan is to replace more than one \n with <br><br>, and > >>> single \n > >>> > > with single <br>. > >>> > > > >>> > > Regards, > >>> > > Edwin > >>> > > > >>> > >> On Wed, 20 Feb 2019 at 14:59, Jörn Franke <jornfra...@gmail.com> > >>> wrote: > >>> > >> > >>> > >> Solr uses Java regex matching, so i doubt there is a bug - it > would > >>> then > >>> > >> be in the JDK. Try out in a regex online Tool that supports Java > >>> regex > >>> > for > >>> > >> your solution. > >>> > >> > >>> > >> I believe you want to have 2 regex process factories: > >>> > >> One that deals with single \n and one that deals with more than > one > >>> \n > >>> > >> > >>> > >>> Am 20.02.2019 um 06:17 schrieb Zheng Lin Edwin Yeo < > >>> > edwinye...@gmail.com > >>> > >>> : > >>> > >>> > >>> > >>> Hi, > >>> > >>> > >>> > >>> We have tried with the following pattern ([ \t]*\r?\n){2,} and > >>> > >>> configuration: > >>> > >>> > >>> > >>> <processor class="solr.RegexReplaceProcessorFactory"> > >>> > >>> <str name="fieldName">content</str> > >>> > >>> <str name="pattern">([ \t]*\r?\n){2,}</str> > >>> > >>> <str name="replacement"><br><br></str> > >>> > >>> <bool name="literalReplacement">true</bool> > >>> > >>> </processor> > >>> > >>> > >>> > >>> However, the issue is still occurring. > >>> > >>> > >>> > >>> Anyone else is able to help? > >>> > >>> > >>> > >>> Regards, > >>> > >>> Edwin > >>> > >>> > >>> > >>> On Fri, 15 Feb 2019 at 11:47, Zheng Lin Edwin Yeo < > >>> > edwinye...@gmail.com> > >>> > >>> wrote: > >>> > >>> > >>> > >>>> Hi, > >>> > >>>> > >>> > >>>> For your info, this issue is occurring in Solr 7.7.0 as well. > >>> > >>>> > >>> > >>>> Regards, > >>> > >>>> Edwin > >>> > >>>> > >>> > >>>> On Tue, 12 Feb 2019 at 00:10, Zheng Lin Edwin Yeo < > >>> > edwinye...@gmail.com > >>> > >>> > >>> > >>>> wrote: > >>> > >>>> > >>> > >>>>> Hi, > >>> > >>>>> > >>> > >>>>> Should we report this as a bug in Solr? > >>> > >>>>> > >>> > >>>>> Regards, > >>> > >>>>> Edwin > >>> > >>>>> > >>> > >>>>> On Fri, 8 Feb 2019 at 22:18, Zheng Lin Edwin Yeo < > >>> > edwinye...@gmail.com > >>> > >>> > >>> > >>>>> wrote: > >>> > >>>>> > >>> > >>>>>> Hi Paul, > >>> > >>>>>> > >>> > >>>>>> Regarding the regex (\n\s*){2,} that we are using, when we try > >>> in on > >>> > >>>>>> https://regex101.com/, it is able to give us the correct > >>> result for > >>> > >> all > >>> > >>>>>> the examples (ie: All of them will only have <br><br>, and not > >>> more > >>> > >> than > >>> > >>>>>> that like what we are getting in Solr in our earlier > examples). > >>> > >>>>>> > >>> > >>>>>> Could there be a possibility of a bug in Solr? > >>> > >>>>>> > >>> > >>>>>> Regards, > >>> > >>>>>> Edwin > >>> > >>>>>> > >>> > >>>>>> On Fri, 8 Feb 2019 at 00:33, Zheng Lin Edwin Yeo < > >>> > >> edwinye...@gmail.com> > >>> > >>>>>> wrote: > >>> > >>>>>> > >>> > >>>>>>> Hi Paul, > >>> > >>>>>>> > >>> > >>>>>>> We have tried it with the space preceeding the \n i.e. <str > >>> > >>>>>>> name="pattern">(\s*\n){2,}</str>, with the following regex > >>> pattern: > >>> > >>>>>>> > >>> > >>>>>>> <processor class="solr.RegexReplaceProcessorFactory"> > >>> > >>>>>>> <str name="fieldName">content</str> > >>> > >>>>>>> <str name="pattern">(\s*\n){2,}</str> > >>> > >>>>>>> <str name="replacement"><br><br></str> > >>> > >>>>>>> </processor> > >>> > >>>>>>> > >>> > >>>>>>> However, we are also getting the exact same results as the > >>> earlier > >>> > >>>>>>> Example 1, 2 and 3. > >>> > >>>>>>> > >>> > >>>>>>> As for your point 2 on perhaps in the data you have other > (non > >>> > >>>>>>> printing) characters than \n, we have find that there are no > >>> non > >>> > >> printing > >>> > >>>>>>> characters. It is just next line with a space. You can refer > >>> to the > >>> > >>>>>>> original content in the same examples below. > >>> > >>>>>>> > >>> > >>>>>>> > >>> > >>>>>>> Example 1: The sentence that the above regex pattern is > working > >>> > >>>>>>> correctly > >>> > >>>>>>> *Original content in EML file:* > >>> > >>>>>>> Dear Sir, > >>> > >>>>>>> > >>> > >>>>>>> > >>> > >>>>>>> I am terminating > >>> > >>>>>>> *Original content:* Dear Sir, \n\n \n \n\n I am > terminating > >>> > >>>>>>> *Index content: * Dear Sir, <br><br>I am terminating > >>> > >>>>>>> > >>> > >>>>>>> Example 2: The sentence that the above regex pattern is > >>> partially > >>> > >>>>>>> working (as you can see, instead of 2 <br>, there are 4 <br>) > >>> > >>>>>>> *Original content in EML file:* > >>> > >>>>>>> > >>> > >>>>>>> *exalted* > >>> > >>>>>>> > >>> > >>>>>>> *Psalm 89:17* > >>> > >>>>>>> > >>> > >>>>>>> > >>> > >>>>>>> 3 Choa Chu Kang Avenue 4 > >>> > >>>>>>> *Original content:* exalted \n \n\n Psalm 89:17 \n\n > >>> \n\n 3 > >>> > >>>>>>> Choa Chu Kang Avenue 4, Singapore > >>> > >>>>>>> *Index content: *exalted <br><br>Psalm 89:17 <br><br> > >>> <br><br>3 > >>> > >>>>>>> Choa Chu Kang Avenue 4, Singapore > >>> > >>>>>>> > >>> > >>>>>>> Example 3: The sentence that the above regex pattern is > >>> partially > >>> > >>>>>>> working (as you can see, instead of 2 <br>, there are 4 <br>) > >>> > >>>>>>> *Original content in EML file:* > >>> > >>>>>>> > >>> > >>>>>>> http://www.concordpri.moe.edu.sg/ > >>> > >>>>>>> > >>> > >>>>>>> > >>> > >>>>>>> > >>> > >>>>>>> > >>> > >>>>>>> > >>> > >>>>>>> > >>> > >>>>>>> > >>> > >>>>>>> > >>> > >>>>>>> On Tue, Dec 18, 2018 at 10:07 AM > >>> > >>>>>>> *Original content:* http://www.concordpri.moe.edu.sg/ \n\n > >>> > \n\n > >>> > >> \n > >>> > >>>>>>> \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n\n \n\n\n > On > >>> Tue, > >>> > >> Dec 18, > >>> > >>>>>>> 2018 at 10:07 AM > >>> > >>>>>>> *Index content: *http://www.concordpri.moe.edu.sg/ > <br><br> > >>> > >>>>>>> <br><br>On Tue, Dec 18, 2018 at 10:07 AM > >>> > >>>>>>> > >>> > >>>>>>> > >>> > >>>>>>> Appreciate any other ideas or suggestions that you may have. > >>> > >>>>>>> > >>> > >>>>>>> Thank you. > >>> > >>>>>>> > >>> > >>>>>>> Regards, > >>> > >>>>>>> Edwin > >>> > >>>>>>> > >>> > >>>>>>>> On Thu, 7 Feb 2019 at 22:49, <paul.d...@ub.unibe.ch> wrote: > >>> > >>>>>>>> > >>> > >>>>>>>> Hi Edwin > >>> > >>>>>>>> > >>> > >>>>>>>> > >>> > >>>>>>>> > >>> > >>>>>>>> 1. Sorry, the pattern was wrong, the space should preceed > >>> the \n > >>> > >>>>>>>> i.e. <str name="pattern">(\s*\n){2,}</str> > >>> > >>>>>>>> 2. Perhaps in the data you have other (non printing) > >>> characters > >>> > >>>>>>>> than \n? > >>> > >>>>>>>> > >>> > >>>>>>>> > >>> > >>>>>>>> > >>> > >>>>>>>> Gesendet von Mail< > >>> https://go.microsoft.com/fwlink/?LinkId=550986> > >>> > >> für > >>> > >>>>>>>> Windows 10 > >>> > >>>>>>>> > >>> > >>>>>>>> > >>> > >>>>>>>> > >>> > >>>>>>>> Von: Zheng Lin Edwin Yeo<mailto:edwinye...@gmail.com> > >>> > >>>>>>>> Gesendet: Donnerstag, 7. Februar 2019 15:23 > >>> > >>>>>>>> An: solr-user@lucene.apache.org<mailto: > >>> > solr-user@lucene.apache.org> > >>> > >>>>>>>> Betreff: Re: RegexReplaceProcessorFactory pattern to detect > >>> > >> multiple \n > >>> > >>>>>>>> > >>> > >>>>>>>> > >>> > >>>>>>>> > >>> > >>>>>>>> Hi Paul, > >>> > >>>>>>>> > >>> > >>>>>>>> We have tried this suggested regex pattern as follow: > >>> > >>>>>>>> <processor class="solr.RegexReplaceProcessorFactory"> > >>> > >>>>>>>> <str name="fieldName">content</str> > >>> > >>>>>>>> <str name="pattern">(\n\s*){2,}</str> > >>> > >>>>>>>> <str name="replacement"><br><br></str> > >>> > >>>>>>>> </processor> > >>> > >>>>>>>> > >>> > >>>>>>>> But we still have exactly the same problem of Example 1,2 > and > >>> 3 > >>> > >> below. > >>> > >>>>>>>> > >>> > >>>>>>>> Example 1: The sentence that the above regex pattern is > >>> working > >>> > >>>>>>>> correctly > >>> > >>>>>>>> *Original content:* Dear Sir, \n\n \n \n\n I am > >>> terminating > >>> > >>>>>>>> *Index content: * Dear Sir, <br><br>I am terminating > >>> > >>>>>>>> > >>> > >>>>>>>> Example 2: The sentence that the above regex pattern is > >>> partially > >>> > >>>>>>>> working > >>> > >>>>>>>> (as you can see, instead of 2 <br>, there are 4 <br>) > >>> > >>>>>>>> *Original content:* exalted \n \n\n Psalm 89:17 \n\n > >>> \n\n > >>> > 3 > >>> > >>>>>>>> Choa > >>> > >>>>>>>> Chu Kang Avenue 4, Singapore > >>> > >>>>>>>> *Index content: *exalted <br><br>Psalm 89:17 <br><br> > >>> > <br><br>3 > >>> > >>>>>>>> Choa > >>> > >>>>>>>> Chu Kang Avenue 4, Singapore > >>> > >>>>>>>> > >>> > >>>>>>>> Example 3: The sentence that the above regex pattern is > >>> partially > >>> > >>>>>>>> working > >>> > >>>>>>>> (as you can see, instead of 2 <br>, there are 4 <br>) > >>> > >>>>>>>> *Original content:* http://www.concordpri.moe.edu.sg/ > \n\n > >>> > \n\n > >>> > >>>>>>>> \n \n\n > >>> > >>>>>>>> \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n\n \n\n\n On > >>> Tue, Dec > >>> > >> 18, > >>> > >>>>>>>> 2018 > >>> > >>>>>>>> at 10:07 AM > >>> > >>>>>>>> *Index content: *http://www.concordpri.moe.edu.sg/ > <br><br> > >>> > >>>>>>>> <br><br>On > >>> > >>>>>>>> Tue, Dec 18, 2018 at 10:07 AM > >>> > >>>>>>>> > >>> > >>>>>>>> Any further suggestion? > >>> > >>>>>>>> > >>> > >>>>>>>> Thank you. > >>> > >>>>>>>> > >>> > >>>>>>>> Regards, > >>> > >>>>>>>> Edwin > >>> > >>>>>>>> > >>> > >>>>>>>>> On Thu, 7 Feb 2019 at 22:20, <paul.d...@ub.unibe.ch> > wrote: > >>> > >>>>>>>>> > >>> > >>>>>>>>> To avoid the «\n+\s*» matching too many \n and then failing > >>> on > >>> > the > >>> > >>>>>>>> {2,} > >>> > >>>>>>>>> part you could try > >>> > >>>>>>>>> > >>> > >>>>>>>>> > >>> > >>>>>>>>> > >>> > >>>>>>>>> <str name="pattern">(\n\s*){2,}</str> > >>> > >>>>>>>>> > >>> > >>>>>>>>> > >>> > >>>>>>>>> > >>> > >>>>>>>>> If you also want to match CRLF then > >>> > >>>>>>>>> > >>> > >>>>>>>>> <str name="pattern">(\r?\n\s*){2,}</str> > >>> > >>>>>>>>> > >>> > >>>>>>>>> > >>> > >>>>>>>>> > >>> > >>>>>>>>> > >>> > >>>>>>>>> > >>> > >>>>>>>>> Gesendet von Mail< > >>> https://go.microsoft.com/fwlink/?LinkId=550986 > >>> > > > >>> > >>>>>>>> für > >>> > >>>>>>>>> Windows 10 > >>> > >>>>>>>>> > >>> > >>>>>>>>> > >>> > >>>>>>>>> > >>> > >>>>>>>>> Von: Zheng Lin Edwin Yeo<mailto:edwinye...@gmail.com> > >>> > >>>>>>>>> Gesendet: Donnerstag, 7. Februar 2019 15:10 > >>> > >>>>>>>>> An: solr-user@lucene.apache.org<mailto: > >>> > solr-user@lucene.apache.org > >>> > >>> > >>> > >>>>>>>>> Betreff: Re: RegexReplaceProcessorFactory pattern to detect > >>> > >> multiple > >>> > >>>>>>>> \n > >>> > >>>>>>>>> > >>> > >>>>>>>>> > >>> > >>>>>>>>> > >>> > >>>>>>>>> Hi Paul, > >>> > >>>>>>>>> > >>> > >>>>>>>>> Thanks for your reply. > >>> > >>>>>>>>> > >>> > >>>>>>>>> When I use this pattern: > >>> > >>>>>>>>> <processor class="solr.RegexReplaceProcessorFactory"> > >>> > >>>>>>>>> <str name="fieldName">content</str> > >>> > >>>>>>>>> <str name="pattern">(\n+\s*){2,}</str> > >>> > >>>>>>>>> <str name="replacement"><br><br></str> > >>> > >>>>>>>>> </processor> > >>> > >>>>>>>>> > >>> > >>>>>>>>> It is working for some sentence within the same content and > >>> not > >>> > >>>>>>>> working for > >>> > >>>>>>>>> some sentences. Please see below for the one that is > working > >>> and > >>> > >>>>>>>> another > >>> > >>>>>>>>> that is not working (partially working): > >>> > >>>>>>>>> > >>> > >>>>>>>>> Example 1: The sentence that the above regex pattern is > >>> working > >>> > >>>>>>>> correctly > >>> > >>>>>>>>> *Original content:* Dear Sir, \n\n \n \n\n I am > >>> terminating > >>> > >>>>>>>>> *Index content: * Dear Sir, <br><br>I am terminating > >>> > >>>>>>>>> > >>> > >>>>>>>>> Example 2: The sentence that the above regex pattern is > >>> partially > >>> > >>>>>>>> working > >>> > >>>>>>>>> (as you can see, instead of 2 <br>, there are 4 <br>) > >>> > >>>>>>>>> *Original content:* exalted \n \n\n Psalm 89:17 \n\n > >>> > \n\n 3 > >>> > >>>>>>>> Choa > >>> > >>>>>>>>> Chu Kang Avenue 4, Singapore > >>> > >>>>>>>>> *Index content: *exalted <br><br>Psalm 89:17 <br><br> > >>> > <br><br>3 > >>> > >>>>>>>> Choa > >>> > >>>>>>>>> Chu Kang Avenue 4, Singapore > >>> > >>>>>>>>> > >>> > >>>>>>>>> Example 3: The sentence that the above regex pattern is > >>> partially > >>> > >>>>>>>> working > >>> > >>>>>>>>> (as you can see, instead of 2 <br>, there are 4 <br>) > >>> > >>>>>>>>> *Original content:* http://www.concordpri.moe.edu.sg/ > \n\n > >>> > >> \n\n > >>> > >>>>>>>> \n > >>> > >>>>>>>>> \n\n > >>> > >>>>>>>>> \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n\n \n\n\n On > >>> Tue, > >>> > Dec > >>> > >>>>>>>> 18, 2018 > >>> > >>>>>>>>> at 10:07 AM > >>> > >>>>>>>>> *Index content: *http://www.concordpri.moe.edu.sg/ > >>> <br><br> > >>> > >>>>>>>> <br><br>On > >>> > >>>>>>>>> Tue, Dec 18, 2018 at 10:07 AM > >>> > >>>>>>>>> > >>> > >>>>>>>>> We would appreciate your help to see what is wrong? > >>> > >>>>>>>>> > >>> > >>>>>>>>> Thank you. > >>> > >>>>>>>>> > >>> > >>>>>>>>> Regards, > >>> > >>>>>>>>> Edwin > >>> > >>>>>>>>> > >>> > >>>>>>>>>> On Thu, 7 Feb 2019 at 21:24, <paul.d...@ub.unibe.ch> > wrote: > >>> > >>>>>>>>>> > >>> > >>>>>>>>>> You don’t say what happens, just that it is not working. I > >>> > assume > >>> > >>>>>>>> nothing > >>> > >>>>>>>>>> is replaced? Perhaps the pattern should be > >>> > >>>>>>>>>> > >>> > >>>>>>>>>> > >>> > >>>>>>>>>> > >>> > >>>>>>>>>> <str name="pattern">"(\n\s*){2,}"</str> > >>> > >>>>>>>>>> > >>> > >>>>>>>>>> > >>> > >>>>>>>>>> > >>> > >>>>>>>>>> ?? > >>> > >>>>>>>>>> > >>> > >>>>>>>>>> > >>> > >>>>>>>>>> > >>> > >>>>>>>>>> Gesendet von Mail< > >>> > https://go.microsoft.com/fwlink/?LinkId=550986> > >>> > >>>>>>>> für > >>> > >>>>>>>>>> Windows 10 > >>> > >>>>>>>>>> > >>> > >>>>>>>>>> > >>> > >>>>>>>>>> > >>> > >>>>>>>>>> Von: Zheng Lin Edwin Yeo<mailto:edwinye...@gmail.com> > >>> > >>>>>>>>>> Gesendet: Donnerstag, 7. Februar 2019 14:08 > >>> > >>>>>>>>>> An: solr-user@lucene.apache.org<mailto: > >>> > >> solr-user@lucene.apache.org > >>> > >>>>>>>>> > >>> > >>>>>>>>>> Betreff: RegexReplaceProcessorFactory pattern to detect > >>> multiple > >>> > >> \n > >>> > >>>>>>>>>> > >>> > >>>>>>>>>> > >>> > >>>>>>>>>> > >>> > >>>>>>>>>> Hi, > >>> > >>>>>>>>>> > >>> > >>>>>>>>>> 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 > >>> > >>>>>>>>>> regex101.com. 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"><br><br></str> > >>> > >>>>>>>>>> </processor> > >>> > >>>>>>>>>> </updateRequestProcessorChain> > >>> > >>>>>>>>>> > >>> > >>>>>>>>>> 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. > >>> > >>>>>>>>>> > >>> > >>>>>>>>>> Regards, > >>> > >>>>>>>>>> Edwin > >>> > >>>>>>>>>> > >>> > >>>>>>>>> > >>> > >>>>>>>> > >>> > >>>>>>> > >>> > >> > >>> > > >>> > >> >