Re: persistentmanager loads only part of session?
I don't think that can happen. I'm using sticky session so the first server gets all requests, then I kill it and only then are requests routed to the second server. On Mon, 18 May 2020, 21:15 Christopher Schultz, < ch...@christopherschultz.net> wrote: > -BEGIN PGP SIGNED MESSAGE- > Hash: SHA256 > > Jonathan, > > On 5/18/20 12:52, Jonathan Yom-Tov wrote: > > I see the persisted copy in the file and it has two keys, so I > > don't think that's it. It's probably some sort of parallelism issue > > since it happens only occasionally, but the map is a > > ConcurrentHashMap, so I can't see how it would be overwritten. > > What happens if both servers write the file at the same time? > > - -chris > > > On Mon, 18 May 2020, 19:47 Mark Thomas, wrote: > > > >> On 18/05/2020 15:23, Jonathan Yom-Tov wrote: > >>> Here's my setup: I have two Tomcats using PersistentManager > >>> with > >> FileStore > >>> to store sessions on a NFS they both have access to. Inside the > >>> session there's an object which contains a map. I also have a > >>> request listener > >> that > >>> logs the contents of the map on every request. > >>> > >>> I kill one Tomcat and I can see in the session file that the > >>> map contains two keys. I then make a request to the remaining > >>> Tomcat and I can see the map contains only one key. > >>> > >>> The only way I can think of that that would happen is if the > >>> map was only partially loaded from the file. Is that even > >>> possible? Any good ideas on how to debug this? > >> > >> Best guess you add the Map containing one key to the session and > >> then later add a second key the Map. Tomcat doesn't consider the > >> session to be updated when the second key is added so the > >> persisted copy doesn't get updated. > >> > >> Mark > >> > >> > >> - > >> > >> > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > >> For additional commands, e-mail: users-h...@tomcat.apache.org > >> > >> > > > -BEGIN PGP SIGNATURE- > Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/ > > iQIzBAEBCAAdFiEEMmKgYcQvxMe7tcJcHPApP6U8pFgFAl7C0MgACgkQHPApP6U8 > pFh8MQ/7BXrjQ9dpvDIbXBaWXXF+1jAXHccOCn471SjN4rqkn5zuyQcPASEI0Gxs > bgfVnKRJu6ZCc5yQhkISLB4l2aE7/+duL8SRFygcaZRrVeBtRi+LSOyQQRAYqGyJ > PbVgO0eAp823+ii93tkWgUxpRgKERmlyM+6M5R22OKHW5Erck+DLLK1xeEn8HYOU > DvNMxS2/eawoxl811JwGfhUX/01tazV9kjeaRmVucUuqZWYQfX3qmCTAHyBDrT5b > hu76BkZQ5/aB+sZUClZu0/PuGQ3Q8vNJjDh+FlYjpuxzm7wotJxCp682+RgkfriK > bLE9a2Fn7Lzr2OZt2ZmPXnvMO0/Ai9Pb4Z+fMF/vWkMs6ZtH5RwxYiLfl/uzQrFj > oH9+bNj/WXOSOLLOOFE16UZc7P59G5NvI1iEpRtzOJOSZRVDchq9nff6sSfEhK1z > 9cOSVuBpvRSyKAhAC62G5q0eSHQ9GEJGwBREqkFAift0qn8MtjRe+XzPR9CBwcZ2 > HPwFTZ+Bs5ohqpCXijc9nwg0UwiAFefUdPEpVJHDJoRsv4IC06fagdAZaqAWeaEu > LiY0lPWFj+7YnQ4oV9mfho19B8y1hwA6eGKaU3BSHfyc67knqZFtZYyfFVITXHh1 > E/SuOlXM3gci3vbhpHV6JqDeItmkB810Dx4McbsRUNFqu9982pc= > =Y5dx > -END PGP SIGNATURE- > > - > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > >
Re: persistentmanager loads only part of session?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Jonathan, On 5/18/20 12:52, Jonathan Yom-Tov wrote: > I see the persisted copy in the file and it has two keys, so I > don't think that's it. It's probably some sort of parallelism issue > since it happens only occasionally, but the map is a > ConcurrentHashMap, so I can't see how it would be overwritten. What happens if both servers write the file at the same time? - -chris > On Mon, 18 May 2020, 19:47 Mark Thomas, wrote: > >> On 18/05/2020 15:23, Jonathan Yom-Tov wrote: >>> Here's my setup: I have two Tomcats using PersistentManager >>> with >> FileStore >>> to store sessions on a NFS they both have access to. Inside the >>> session there's an object which contains a map. I also have a >>> request listener >> that >>> logs the contents of the map on every request. >>> >>> I kill one Tomcat and I can see in the session file that the >>> map contains two keys. I then make a request to the remaining >>> Tomcat and I can see the map contains only one key. >>> >>> The only way I can think of that that would happen is if the >>> map was only partially loaded from the file. Is that even >>> possible? Any good ideas on how to debug this? >> >> Best guess you add the Map containing one key to the session and >> then later add a second key the Map. Tomcat doesn't consider the >> session to be updated when the second key is added so the >> persisted copy doesn't get updated. >> >> Mark >> >> >> - >> >> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org >> For additional commands, e-mail: users-h...@tomcat.apache.org >> >> > -BEGIN PGP SIGNATURE- Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/ iQIzBAEBCAAdFiEEMmKgYcQvxMe7tcJcHPApP6U8pFgFAl7C0MgACgkQHPApP6U8 pFh8MQ/7BXrjQ9dpvDIbXBaWXXF+1jAXHccOCn471SjN4rqkn5zuyQcPASEI0Gxs bgfVnKRJu6ZCc5yQhkISLB4l2aE7/+duL8SRFygcaZRrVeBtRi+LSOyQQRAYqGyJ PbVgO0eAp823+ii93tkWgUxpRgKERmlyM+6M5R22OKHW5Erck+DLLK1xeEn8HYOU DvNMxS2/eawoxl811JwGfhUX/01tazV9kjeaRmVucUuqZWYQfX3qmCTAHyBDrT5b hu76BkZQ5/aB+sZUClZu0/PuGQ3Q8vNJjDh+FlYjpuxzm7wotJxCp682+RgkfriK bLE9a2Fn7Lzr2OZt2ZmPXnvMO0/Ai9Pb4Z+fMF/vWkMs6ZtH5RwxYiLfl/uzQrFj oH9+bNj/WXOSOLLOOFE16UZc7P59G5NvI1iEpRtzOJOSZRVDchq9nff6sSfEhK1z 9cOSVuBpvRSyKAhAC62G5q0eSHQ9GEJGwBREqkFAift0qn8MtjRe+XzPR9CBwcZ2 HPwFTZ+Bs5ohqpCXijc9nwg0UwiAFefUdPEpVJHDJoRsv4IC06fagdAZaqAWeaEu LiY0lPWFj+7YnQ4oV9mfho19B8y1hwA6eGKaU3BSHfyc67knqZFtZYyfFVITXHh1 E/SuOlXM3gci3vbhpHV6JqDeItmkB810Dx4McbsRUNFqu9982pc= =Y5dx -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: persistentmanager loads only part of session?
I see the persisted copy in the file and it has two keys, so I don't think that's it. It's probably some sort of parallelism issue since it happens only occasionally, but the map is a ConcurrentHashMap, so I can't see how it would be overwritten. On Mon, 18 May 2020, 19:47 Mark Thomas, wrote: > On 18/05/2020 15:23, Jonathan Yom-Tov wrote: > > Here's my setup: I have two Tomcats using PersistentManager with > FileStore > > to store sessions on a NFS they both have access to. Inside the session > > there's an object which contains a map. I also have a request listener > that > > logs the contents of the map on every request. > > > > I kill one Tomcat and I can see in the session file that the map contains > > two keys. I then make a request to the remaining Tomcat and I can see the > > map contains only one key. > > > > The only way I can think of that that would happen is if the map was only > > partially loaded from the file. Is that even possible? Any good ideas on > > how to debug this? > > Best guess you add the Map containing one key to the session and then > later add a second key the Map. Tomcat doesn't consider the session to > be updated when the second key is added so the persisted copy doesn't > get updated. > > Mark > > > - > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > >
Re: persistentmanager loads only part of session?
On 18/05/2020 15:23, Jonathan Yom-Tov wrote: > Here's my setup: I have two Tomcats using PersistentManager with FileStore > to store sessions on a NFS they both have access to. Inside the session > there's an object which contains a map. I also have a request listener that > logs the contents of the map on every request. > > I kill one Tomcat and I can see in the session file that the map contains > two keys. I then make a request to the remaining Tomcat and I can see the > map contains only one key. > > The only way I can think of that that would happen is if the map was only > partially loaded from the file. Is that even possible? Any good ideas on > how to debug this? Best guess you add the Map containing one key to the session and then later add a second key the Map. Tomcat doesn't consider the session to be updated when the second key is added so the persisted copy doesn't get updated. Mark - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
persistentmanager loads only part of session?
Here's my setup: I have two Tomcats using PersistentManager with FileStore to store sessions on a NFS they both have access to. Inside the session there's an object which contains a map. I also have a request listener that logs the contents of the map on every request. I kill one Tomcat and I can see in the session file that the map contains two keys. I then make a request to the remaining Tomcat and I can see the map contains only one key. The only way I can think of that that would happen is if the map was only partially loaded from the file. Is that even possible? Any good ideas on how to debug this?
