Is it possible to add a Slack call to a Google Calendar event?

When I invite a co-worker to meet with me, I often want to meet via a Slack call. It is easy to add a link to the calendar invite for a Zoom call, a Hangouts call, or even a Jitsi call (we use Google Calendar and there are integrations for all three). I am wondering if there is some way to achieve the same convenient “hop on the call in one click” when using Slack.

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Author: lucas

Jenkins Slack plugin gives SSLHandshake Error

We have some restrict envronment for our Jenkins master. We had allowed limited IP addresses outbound traffic.

Slack might be using pool of IPs, when they match our range, we get the message in slack. When they are not in range, we are blind for any failure.

My configuration are as below.

Job Configuration
Config1

Slack Configuration
Config2

When I click on the Test Connection (ip choose by slack is not in our network allowed range), it failed and gives below error in logs.

2020-08-14 20:50:46.416+0000 [id=6027608]   WARNING j.p.slack.StandardSlackService#correctMisconfigurationOfBaseUrl: Overriding base url to team domain 'mycompany' this is due to mis-configuration, you don't need to set base url unless you're using a slack compatible app like mattermost
2020-08-14 20:50:46.426+0000 [id=6027608]   WARNING j.p.slack.StandardSlackService#postToSlack: Error posting to Slack
javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure
    at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
    at sun.security.ssl.Alerts.getSSLException(Alerts.java:154)
    at sun.security.ssl.SSLSocketImpl.recvAlert(SSLSocketImpl.java:2033)
    at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1135)
    at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1385)
    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1413)
    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1397)
    at org.apache.http.conn.ssl.SSLConnectionSocketFactory.createLayeredSocket(SSLConnectionSocketFactory.java:436)
    at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.upgrade(DefaultHttpClientConnectionOperator.java:191)
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.upgrade(PoolingHttpClientConnectionManager.java:390)
    at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:428)
    at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236)
    at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:186)
    at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)
    at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)
    at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:108)
    at jenkins.plugins.slack.StandardSlackService.postToSlack(StandardSlackService.java:177)
    at jenkins.plugins.slack.StandardSlackService.publish(StandardSlackService.java:269)
    at jenkins.plugins.slack.StandardSlackService.publish(StandardSlackService.java:308)
    at jenkins.plugins.slack.StandardSlackService.publish(StandardSlackService.java:280)
    at jenkins.plugins.slack.SlackNotifier$DescriptorImpl.doTestConnection(SlackNotifier.java:908)
    at java.lang.invoke.MethodHandle.invokeWithArguments(MethodHandle.java:627)
    at org.kohsuke.stapler.Function$MethodFunction.invoke(Function.java:396)
    at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:408)
    at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:212)
    at org.kohsuke.stapler.SelectionInterceptedFunction$Adapter.invoke(SelectionInterceptedFunction.java:36)
    at org.kohsuke.stapler.verb.HttpVerbInterceptor.invoke(HttpVerbInterceptor.java:48)
    at org.kohsuke.stapler.SelectionInterceptedFunction.bindAndInvoke(SelectionInterceptedFunction.java:26)
    at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:145)
    at org.kohsuke.stapler.MetaClass$11.doDispatch(MetaClass.java:535)
    at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
    at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:747)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:878)
    at org.kohsuke.stapler.MetaClass$4.doDispatch(MetaClass.java:280)
    at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
    at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:747)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:878)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:676)
    at org.kohsuke.stapler.Stapler.service(Stapler.java:238)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:755)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1617)
    at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:154)
    at jenkins.security.ResourceDomainFilter.doFilter(ResourceDomainFilter.java:76)
    at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:151)
    at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:239)
    at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:215)
    at net.bull.javamelody.PluginMonitoringFilter.doFilter(PluginMonitoringFilter.java:88)
    at org.jvnet.hudson.plugins.monitoring.HudsonMonitoringFilter.doFilter(HudsonMonitoringFilter.java:114)
    at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:151)
    at jenkins.telemetry.impl.UserLanguages$AcceptLanguageFilter.doFilter(UserLanguages.java:128)
    at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:151)
    at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:157)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604)
    at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:153)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
    at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:51)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
    at jenkins.security.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:118)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
    at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
    at org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
    at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
    at jenkins.security.BasicHeaderProcessor.doFilter(BasicHeaderProcessor.java:93)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
    at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
    at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:67)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
    at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:90)
    at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:171)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604)
    at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:49)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604)
    at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:82)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604)
    at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:30)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604)
    at jenkins.security.SuspiciousRequestFilter.doFilter(SuspiciousRequestFilter.java:36)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:545)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:566)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1610)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1300)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:485)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1580)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1215)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
    at org.eclipse.jetty.server.Server.handle(Server.java:500)
    at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:383)
    at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:547)
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:375)
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:273)
    at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
    at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
    at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:336)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:313)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:171)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:129)
    at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:375)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:806)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:938)
    at java.lang.Thread.run(Thread.java:748)

When the IP use by slack is in network allowed range, we get notifications.

slack messages

From above screenshot, we didn’t get any notifications between July 21 to August 14 (today). But there are failures in between. Today also, when IP might change, it stop sending again.

When we talked about this, they suspect jenkins configuration was wrong. Which is not the case, because we not change our configuration, and same configuration works sometimes.

How can I reproduce this handshake error using linux command ?

That way I can give something to them to show, its networking issue, not the application.

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Author: Nilesh

How to delete an entire Slack conversation between two people

I’m a member of two work Slack channels.

An old Slack channel from a few years is now being re-used. When last in use there were a lot of difficulties between myself and another colleague, and to my embarrasment the conversation history from two years ago is still there. A lot of vitriolic things were said on both sides, and I’d now like to wipe the slate clean with this conversation.

So… any advice on how I can remove, hide or archive a Slack conversation history between myself and this other colleague? I guess this is not possible!

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Author: Stamp

Can I add same sidebar section groupings for all workspace users?

We have a workspace on the standard plan – can now add sidebar sections (amazing feature).

I have set-up my own workspace using sections and dragged all channels into relevant sidebar sections. But this only applies to me – all other users do not see my “section architecture”.

Right now it is possible for all users of the workspace to customise their own section architecture. I would like to set my architecture as the default for all users.

Is there any way that I can set up channel & section architecture and make that default to all other users of the same workspace?

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Author: Paul Satem