I would think that because you are not trying to obtain the lock in a WRITE statement, it would not be classified as a waiter. True, it's waiting because of the lock but by not trying to obtain the lock, it's only waiting for the blockage to clear. If it were to be classified as a waiter then I would expect to see a LOCKED clause on the WRITE statement like there is on the READU. For that matter, I'd expect to see a WRITEU command as well and the standard WRITE to completely ignore locking.
Just my guess, though. BobW -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Charles Stevenson Sent: Monday, October 24, 2011 2:12 PM To: U2 Users List Subject: [U2] [UV] LIST.READU EVERY's "waiters" when there are writes w/o explicit readu. UV 10.2.10 on Windows is behaving differently from what I recall. Are my expectations out of line? Suppose Session A holds a readu lock; and Session B attempts a WRITE to same record withOUT!!! 1st explicitly getting the readu lock. Session B waits for Session A to release the lock before writing the record. While Session B is waiting, does it show up as a "waiter" in LIST.READU EVERY? I expected so, but it doesn't. Session A Session B _____________________________ ___________________ 1A. ED VOC DUMMY (this sets the readu lock.) 2A. (stay in editor) 2B. run this: 01: OPEN 'VOC' TO F ELSE STOPM 'nope' 02: ***READU REC FROM F, 'DUMMY' ELSE NULL 03: WRITE '' TO F, 'DUMMY' 3A. Within ED: XEQ LIST.READU EVERY If I UN-comment line 2, LIST.READU EVERY shows something like this: Active Read Waiters: Owner Waiter Device.... Inode.... Userno Userno 746117947 232860913 6116 3396 But when I comment out line 2, LIST.READU is silent. I have not yet explored what the deadlock daemon does. TIA, cds P.S. Yes, yes, "Bad Form", "Legacy Software", 20 min wait is configurable, . . . we can talk later. _______________________________________________ U2-Users mailing list [email protected] http://listserver.u2ug.org/mailman/listinfo/u2-users _______________________________________________ U2-Users mailing list [email protected] http://listserver.u2ug.org/mailman/listinfo/u2-users
