topic Re: DTSS behaving strangely ? in Operating System - OpenVMS

DTSS behaving strangely ?

Wim Van den Wyngaert — Tue, 25 Mar 2008 06:35:29 GMT

We have VMS 7.3 with decnet 7.3 eco 3 (yes I know, not fully patched).

This Sunday time changed twice while it should happend next Sunday. The strange thing is : all our nodes have the same settings but only a subset of 10% (2 clusters and 1 stand alone node) had the problem.

See enclosure for more data.

Why oh Why ?

Wim

Re: DTSS behaving strangely ?

Wim Van den Wyngaert — Tue, 25 Mar 2008 06:49:02 GMT

BTW : we use this version with unchanged settings since 2003 without any problems.

Found another cluster where only 1 node changed time. The node that changed was up 1185 days, the node that didn't change was up 222 days.

Fwiw

Wim

Re: DTSS behaving strangely ?

Wim Van den Wyngaert — Tue, 25 Mar 2008 09:30:17 GMT

It could be that the same thing happened before but we only enabled time audit in 2007.

Re: DTSS behaving strangely ?

Ian Miller. — Tue, 25 Mar 2008 15:34:43 GMT

could it be that the latest patches update the DST change rules?

Are the all the systems running the same versions ?

Re: DTSS behaving strangely ?

Wim Van den Wyngaert — Tue, 25 Mar 2008 15:37:46 GMT

All running the 2002 version of DTSS. No patches at all since 2003.

Note that time was changed and 3 minutes later again. A bug ? In that case there should be other victems. I checked release notes but found nothing in that direction.

Wim

Re: DTSS behaving strangely ?

Walter Miller_1 — Tue, 25 Mar 2008 18:17:03 GMT

The log file clearly shows:

Next TDF Change = 2008-03-30-01:59:59.999+01:00I0.000

So this does not look like a TDF change but a time change brought about by the MASTER servers having an incorrect time. Current configuration on this node only requires two servers to make a time change.

This node is configured as a CLERK - have you checked the MASTER nodes to see if they made a time change?

Re: DTSS behaving strangely ?

Wim Van den Wyngaert — Wed, 26 Mar 2008 06:30:32 GMT

Walter,

The change was at 3:00 sharp ! And the change back 3(!!!) minutes later.

But I checked our 2 providers (again , did it yesterday).

1st : sync at 2:45. Got 3 acceptable date-times. Next sync at 3:45 idem. Nothing happened in between. Nothing in operator log.

2nd : sync at 2:28. Got 3 times. Next sync at 3:28. Nothing in operator log.

None of the 2 nodes connected to the external clocks changed their times. Each node is connected thru a decserver to the 2 external clocks that are about 5 km apart.

There are 2 other nodes not connected to the clock that are server of time. Nothing in their log files and no time change.

Wim

Re: DTSS behaving strangely ?

Wim Van den Wyngaert — Wed, 26 Mar 2008 08:14:51 GMT

Walter,

On the nodes that did change, operator log says :
DTSS-I-SERTDF DTSS#SERVICE set new timezone differential

So, it did think that it was the change of winter/summer.

Wim

Re: DTSS behaving strangely ?

Walter Miller_1 — Wed, 26 Mar 2008 13:13:10 GMT

Yes, that definitely looks like it was a TDF change. Are you running a TCPIP stack and if so - what version? I seem to remember there was a UCX$TDF logical in pre-V5.0 that could possibly conflict with DTSS.

Re: DTSS behaving strangely ?

Wim Van den Wyngaert — Wed, 26 Mar 2008 13:17:48 GMT

TCP 5.3 eco 2. On ALL systems, those that have the problem and those that don't.

Wim

Re: DTSS behaving strangely ?

Wim Van den Wyngaert — Wed, 26 Mar 2008 13:34:51 GMT

And show logical *tdf* fails on all nodes.

Re: DTSS behaving strangely ?

Wim Van den Wyngaert — Wed, 26 Mar 2008 15:58:28 GMT

Found that time audit was only enabled on production nodes. Thus found 1 more cluster where it changed.

But we have 50 stations that are clones from 1 node. Most did do the change and some did not (including 1 I checked in the beginning). No relation with uptime or physical location.

Wim

Re: DTSS behaving strangely ?

Wim Van den Wyngaert — Thu, 27 Mar 2008 08:30:49 GMT

I find that sys$system:dtss$timezone)differential.dat contains a 2nd line with "/03" only. Is that normal ?

It can not be the problem because it's like this on all machines.

Wim

Re: DTSS behaving strangely ?

Wim Van den Wyngaert — Mon, 07 Apr 2008 09:00:44 GMT

Time changed without problems (except known ones) last Sunday of Mar. Next TDF correct on all nodes (26/10).

Re: DTSS behaving strangely ?

Wim Van den Wyngaert — Mon, 03 Nov 2008 11:54:39 GMT

Went fine on 26/10. Not 1 problem. Next tdf 29/03 as expected.

Wim