Hello, 

After upgrading the Bitbucket Branch Source Plugin Version to 937.0.3, the PULL_REQUEST_UPDATED events from a Bitbucket server no longer trigger a build in Jenkins, for the multi-branch pipeline job.

In the jenkins logs, we found this error:
2025-09-25 11:50:03.081+0000 [id=10600]    SEVERE    c.c.j.p.b.h.BitbucketSCMSourcePushHookReceiver#getHookProcessor: More processors found that handle the incoming Bitbucket hook:
[LF]> [com.cloudbees.jenkins.plugins.bitbucket.impl.webhook.plugin.{*}PluginPullRequestWebhookProcessor{*}, com.cloudbees.jenkins.plugins.bitbucket.impl.webhook.plugin.{*}PluginPushWebhookProcessor{*}]

I precise that our Bitbucket server is on premise, not on the Atlassian cloud.

It seems to be related to this feature https://issues.jenkins.io/browse/JENKINS-74913

In the linked github Pull Request, it integrates the PluginPullRequestWebhookProcessor and PluginPushWebhookProcessor and both manage the PULL_REQUEST_UPDATED event .

My understand is that only the PluginPullRequestWebhookProcessor must support the PULL_REQUEST_UPDATED event. By the way, the Push webhook processor for cloud CloudPushWebhookProcessor only support the PUSH event

Full stack trace

2025-09-25 11:50:03.081+0000 [id=10600]    SEVERE    c.c.j.p.b.h.BitbucketSCMSourcePushHookReceiver#getHookProcessor: More processors found that handle the incoming Bitbucket hook:
[LF]> [com.cloudbees.jenkins.plugins.bitbucket.impl.webhook.plugin.{*}PluginPullRequestWebhookProcessor{*}, com.cloudbees.jenkins.plugins.bitbucket.impl.webhook.plugin.{*}PluginPushWebhookProcessor{*}]
2025-09-25 11:50:03.082+0000 [id=10600]    WARNING    h.i.i.InstallUncaughtExceptionHandler#handleException: Caught unhandled exception with ID 86806621-d4fd-4181-beba-a71474f5a631
java.lang.Exception: More processors found that handle the incoming Bitbucket hook.
    at org.kohsuke.stapler.HttpResponses.error(HttpResponses.java:90)
    at PluginClassLoader for cloudbees-bitbucket-branch-source//com.cloudbees.jenkins.plugins.bitbucket.hooks.BitbucketSCMSourcePushHookReceiver.doNotify(BitbucketSCMSourcePushHookReceiver.java:120)
    at java.base/java.lang.invoke.MethodHandle.invokeWithArguments(MethodHandle.java:732)
    at org.kohsuke.stapler.Function$MethodFunction.invoke(Function.java:484)
    at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:497)
    at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:218)
    at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:140)
    at org.kohsuke.stapler.MetaClass$12.doDispatch(MetaClass.java:686)
    at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:61)
    at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:800)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:938)
    at org.kohsuke.stapler.MetaClass$10.dispatch(MetaClass.java:590)
    at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:800)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:938)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:721)
    at org.kohsuke.stapler.Stapler.service(Stapler.java:253)
    at Jenkins Main ClassLoader//jakarta.servlet.http.HttpServlet.service(HttpServlet.java:587)
    at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHolder.handle(ServletHolder.java:780)
    at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1668)
    at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:204)
    at PluginClassLoader for sse-gateway//org.jenkinsci.plugins.ssegateway.Endpoint$SSEListenChannelFilter.doFilter(Endpoint.java:248)
    at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:201)
    at PluginClassLoader for blueocean-web//io.jenkins.blueocean.ResourceCacheControl.doFilter(ResourceCacheControl.java:134)
    at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:201)
    at PluginClassLoader for blueocean-jwt//io.jenkins.blueocean.auth.jwt.impl.JwtAuthenticationFilter.doFilter(JwtAuthenticationFilter.java:60)
    at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:201)
    at PluginClassLoader for metrics//jenkins.metrics.impl.MetricsFilter.doFilter(MetricsFilter.java:125)
    at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:201)
    at jenkins.util.HttpServletFilter$1.doFilter(HttpServletFilter.java:77)
    at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:201)
    at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:207)
    at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
    at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
    at jenkins.ErrorAttributeFilter.doFilter(ErrorAttributeFilter.java:29)
    at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
    at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
    at PluginClassLoader for cloudbees-bitbucket-branch-source//com.cloudbees.jenkins.plugins.bitbucket.hooks.BitbucketSCMSourcePushHookReceiver.process(BitbucketSCMSourcePushHookReceiver.java:73)
    at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:128)
    at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
    at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
    at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:94)
    at jenkins.security.AcegiSecurityExceptionFilter.doFilter(AcegiSecurityExceptionFilter.java:52)
    at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
    at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:54)
    at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
    at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:125)
    at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:119)
    at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
    at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:100)
    at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
    at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:150)
    at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:105)
    at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
    at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:235)
    at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:229)
    at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
    at jenkins.security.BasicHeaderProcessor.doFilter(BasicHeaderProcessor.java:106)
    at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
    at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:117)
    at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
    at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:63)
    at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
    at hudson.security.ChainedServletFilter2.doFilter(ChainedServletFilter2.java:111)
    at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:173)
    at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
    at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
    at org.kohsuke.stapler.UncaughtExceptionFilter.doFilter(UncaughtExceptionFilter.java:26)
    at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
    at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
    at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:86)
    at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
    at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
    at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:31)
    at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
    at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
    at jenkins.security.SuspiciousRequestFilter.doFilter(SuspiciousRequestFilter.java:38)
    at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)