[community edition] Solr doesn't start after migration from 7.3.0 to 23.4.1

[jkb]

Hello,

I have upgraded my communty edition to 23.4.1 on a Linux Devuan server (Debian like). Previously, solr ran fine. Now, search services fail and if I try to do a connction to localhost:8983/solr, I only obtain following error:

HTTP ERROR 500

Problem accessing /solr/. Reason:

    Server Error

Caused by:

java.lang.NoClassDefFoundError: Could not initialize class org.alfresco.solr.AlfrescoSolrDataModel
	at org.alfresco.solr.security.SecretSharedPropertyCollector.lambda$static$1(SecretSharedPropertyCollector.java:74)
	at org.alfresco.solr.security.SecretSharedPropertyCollector.lambda$getProperty$4(SecretSharedPropertyCollector.java:118)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
	at java.base/java.util.ArrayList$ArrayListSpliterator.tryAdvance(ArrayList.java:1632)
	at java.base/java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:127)

 Solr seems to be running:

Root rayleigh:[/opt/alfresco/alfresco-search-services/logs] > ps auwx | grep solr
tomcat   19824 15.0  7.5 6803200 1237556 ?     Sl   11:14   0:06 java -server -Xms1g -Xmx1g -XX:+UseG1GC -XX:+PerfDisableSharedMem -XX:+ParallelRefProcEnabled -XX:MaxGCPauseMillis=250 -XX:+UseLargePages -XX:+AlwaysPreTouch -XX:+ExplicitGCInvokesConcurrent -Xlog:gc*:file=../../logs/solr_gc.log:time,uptime:filecount=9,filesize=20000 -Dsolr.log.dir=../../logs -Djetty.port=8983 -DSTOP.PORT=7983 -DSTOP.KEY=solrrocks -Duser.timezone=UTC -Djetty.home=/opt/alfresco/alfresco-search-services/solr/server -Dsolr.solr.home=/opt/alfresco/alfresco-search-services/solr/../solrhome -Dsolr.install.dir=/opt/alfresco/alfresco-search-services/solr -Dlog4j.configuration=file:../../logs/log4j.properties -Dsolr.jetty.request.header.size=1000000 -Dsolr.jetty.threads.stop.timeout=300000 -Ddisable.configEdit=true -Xss256k -Dsolr.log.muteconsole -XX:OnOutOfMemoryError=/opt/alfresco/alfresco-search-services/solr/bin/oom_solr.sh 8983 ../../logs -jar start.jar --module=http
root     21023  0.0  0.0   6564  2252 pts/0    S+   11:15   0:00 grep solr
Root rayleigh:[/opt/alfresco/alfresco-search-services/logs] >

and I have no error in solr log file prior to first access from Alfresco:

2025-02-12 10:14:40.370 INFO  (main) [   ] o.e.j.s.Server jetty-9.3.30.v20211001, build timestamp: 2021-10-01T15:51:54Z, git hash: 148ea770504ad315b7936c5737e462879680042b
2025-02-12 10:14:40.789 INFO  (main) [   ] o.a.s.s.SolrDispatchFilter  ___      _       Welcome to Apache Solr™ version 6.6.5-patched.11 67b7042d8e2134a87c2ef6e663b1fb0cc0c2d454 - pzurek - 2022-11-28 14:45:37
2025-02-12 10:14:40.790 INFO  (main) [   ] o.a.s.s.SolrDispatchFilter / __| ___| |_ _   Starting in standalone mode on port 8983
2025-02-12 10:14:40.790 INFO  (main) [   ] o.a.s.s.SolrDispatchFilter \__ \/ _ \ | '_|  Install dir: /opt/alfresco/alfresco-search-services/solr
2025-02-12 10:14:40.793 INFO  (main) [   ] o.a.s.s.SolrDispatchFilter |___/\___/_|_|    Start time: 2025-02-12T10:14:40.790654Z
2025-02-12 10:14:41.479 WARN  (main) [   ] o.a.s.InterceptorRegistry It was not possible to add the Shared Secret Authentication interceptor. Please make sure to pass the required -Dalfresco.secureComms=secret and -Dalfresco.secureComms.secret=my-secret-value JVM args if trying to use Secret Authentication with Solr.
2025-02-12 10:14:41.583 INFO  (main) [   ] o.e.j.s.Server Started @1780ms

I suppose I have done a misconfiguration somewhere, but I'm unable to find where org.alfresco.solr.AlfrescoSolrDataModel is defined.

Help will be welcome,

JB

[steeed]

Does your solr.in.cmd file have these params?

set SOLR_ALFRESCO_SECURECOMMS=secret
set SOLR_ALFRESCO_SECURECOMMS_SECRET=yoursecret

In my case if I don`t set up them at Solr side (even though they are defined at alfresco side in alfresco-global.properies) the requests fail with 403 status code. However the exception messages are not the same like yours...