Have PRC keep the connection open during checksum calculation

[luijs]

During transfer of large files(100's of GB's) with checksumming enabled, the PRC can break the connection when the checksum is being calculated. Is there a way for the PRC to see this and make sure the connection stays open?

See https://groups.google.com/g/irod-chat/c/k7Y7UXdXJ5Y for detailed discussion

Regards,

Joris

edit:
To be a bit more complete, seen with:
irods 4.3.1
Ubuntu 20.04
PRC 2.0.1

[mstfdkmn]

To contribute: we had the same or similar issue reported at and I supposed this was fixed with this after #377 (comment).

[korydraughn]

@luijs Is this the same issue we discussed / worked-out during the UGM troubleshooting session (i.e. it was fixed by upgrading)?

[korydraughn]

I just read the google chat discussion. Seems the upgrade just revealed more information about issue.

[d-w-moore]

@luijs - I now have verified from experimentation that a patch from #570 (a fix for #569), along with an assignment to the connection timeout :

s.connection_timeout = None

should do the trick of preventing the NetworkException during large (eg >=100G) puts with checksum, as also with just calling session.data_objects.chksum( ...) on those large objects with the verifyChecksum option enabled.
So, I'm pretty much ready to close this issue and consider it solved as soon as #570 is merged.

With that knowledge, please let us know if you have further input on this one.

[alanking]

Resolved by changes in #570.