Re: [Tomcat 8.5] Cannot obtain singleton resource with startStopThreads > 1
Well, it works now. It turned out our legacy code for registering cache manager wasn't thread-safe. Nothing is good when you have to work during weekend! :-) Thank you all for the supports. - MrChuoi On Sat, Jun 10, 2017 at 10:29 PM, MrChuoi wrote: > Hi Chuck, > > On Sat, Jun 10, 2017 at 9:34 PM, Caldarale, Charles R < > chuck.caldar...@unisys.com> wrote: > >> > From: MrChuoi [mailto:mrch...@gmail.com] >> > Subject: Re: [Tomcat 8.5] Cannot obtain singleton resource with >> startStopThreads > 1 >> >> > OK. I will put the resource in the context of each webapp to see what is >> > going on, but what I don't understand is why this configuration works >> when >> > I start webapps one-by-one sequentially? >> >> I suspect you're not getting a singleton either way (at least you're not >> supposed to). If you want a singleton, I believe it needs to be specified >> in conf/server.xml via and a in the >> element of each webapp that needs it. >> > > I truly got a singleton with that configuration, because it is a > infinispan cache manager to achieve sharing cache contents between webapps. > I don't have access to my system to put the resource configuration in each > webapps' context for verification at the moment. > > Thanks anyway, > > - MrChuoi > > -- http://forum.vnoss.org
Re: [Tomcat 8.5] Cannot obtain singleton resource with startStopThreads > 1
Hi Chuck, On Sat, Jun 10, 2017 at 9:34 PM, Caldarale, Charles R < chuck.caldar...@unisys.com> wrote: > > From: MrChuoi [mailto:mrch...@gmail.com] > > Subject: Re: [Tomcat 8.5] Cannot obtain singleton resource with > startStopThreads > 1 > > > OK. I will put the resource in the context of each webapp to see what is > > going on, but what I don't understand is why this configuration works > when > > I start webapps one-by-one sequentially? > > I suspect you're not getting a singleton either way (at least you're not > supposed to). If you want a singleton, I believe it needs to be specified > in conf/server.xml via and a in the > element of each webapp that needs it. > I truly got a singleton with that configuration, because it is a infinispan cache manager to achieve sharing cache contents between webapps. I don't have access to my system to put the resource configuration in each webapps' context for verification at the moment. Thanks anyway, - MrChuoi
Re: [Tomcat 8.5] Cannot obtain singleton resource with startStopThreads > 1
Hi Chuck, On Sat, Jun 10, 2017 at 6:58 PM, Caldarale, Charles R < chuck.caldar...@unisys.com> wrote: > > From: MrChuoi [mailto:mrch...@gmail.com] > > Subject: Re: [Tomcat 8.5] Cannot obtain singleton resource with > startStopThreads > 1 > > > Hi Mark, > > Don't top-post. Follow the mailing list guidelines published here: > http://tomcat.apache.org/lists.html#tomcat-users > > > And to simplify the declaration of Resource in Tomcat, I put the > > ...> in %CATALINA_HOME%\conf\context.xml. Is this a mistake? > > That would appear to be one source of difficulty: the items configured in > the global conf/context.xml are applied to each webapp individually, so you > will get one instance of the resource for each webapp. > OK. I will put the resource in the context of each webapp to see what is going on, but what I don't understand is why this configuration works when I start webapps one-by-one sequentially? Thanks, - MrChuoi
Re: [Tomcat 8.5] Cannot obtain singleton resource with startStopThreads > 1
Hi Mark, I follow the guideline here http://tomcat.apache.org/tomcat-8.5-doc/jndi-resources-howto.html to create a Generic JavaBean class which is holding some static info internally. And to simplify the declaration of Resource in Tomcat, I put the in %CATALINA_HOME%\conf\context.xml. Is this a mistake? Thanks, - MrChuoi On Sat, Jun 10, 2017 at 3:37 PM, Mark Thomas wrote: > On 10/06/17 18:35, MrChuoi wrote: > > Hi all, > > > > I can obtain my custom JNDI resource as singleton when starting all of my > > web-apps sequentially. However, if I set startStopThreads > 1 to speedup > > the loading process, Tomcat creates multiple instances of my resource. > Did > > I miss anything in configuration? > > What type of resource? > > Where is it defined? > > What is the definition? > > How is it referenced in your web apps? > > Mark > > > > > > My system info: > > - Windows 7 Pro (64-bit) > > - Tomcat 8.5.12 and 8.5.15 (64-bit) > > - Java 1.7.0_80-b15 (64-bit) > > > > Thanks, > > > > - MrChuoi > > > > > - > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > -- http://forum.vnoss.org
[Tomcat 8.5] Cannot obtain singleton resource with startStopThreads > 1
Hi all, I can obtain my custom JNDI resource as singleton when starting all of my web-apps sequentially. However, if I set startStopThreads > 1 to speedup the loading process, Tomcat creates multiple instances of my resource. Did I miss anything in configuration? My system info: - Windows 7 Pro (64-bit) - Tomcat 8.5.12 and 8.5.15 (64-bit) - Java 1.7.0_80-b15 (64-bit) Thanks, - MrChuoi