Conference lassie::ucx

5348.0. "telnet session hangup" by UTOPIE::BRAUN_R () Tue Mar 18 1997 12:40

Hi all,

my customer has a AXP-cluster with UCX 3.3, ECO10 (it's not supported,
but we don't want to upgrade just for test, it's a rather important
system):

There are lot of users via telnet (from Pathworks-Clients) and they
are running some ASCII-based application I don't know of.

Rather frequently some users are hanging, there are no hints on
a common remote subnet, router, group of users,..

The corresponding process is suspended (?), a stop/id seems to work,
but the process is still there (suspended).

With a large number of users, one would check the resources first, but
we found no waits or drops (see below).

From the SDA we found a TN-device (for telnet), but with UCX SHO DEV /FULL
we are not able to find it (seems to be disconnected, probably undetected
by the application).

This seems to be an application problem, but is there any
known UCX-bug causing the same ?

Any help will be highly appreciated.

Thanks,
Ralph


*************************************************************************

GDC1 > ucx sho vers

  DEC TCP/IP Services for OpenVMS AXP Version V3.3 - ECO Level 10
  on a DEC 7000 Model 710 running OpenVMS V6.1

GDC1 >

GDC1 > ucx sho int
                                                           Packets
Interface   IP_Addr         Network mask          Receive          Send     MTU

 FF0        10.220.2.1      255.255.255.0         8186303       5293963    4348
 LO0        127.0.0.1       255.0.0.0                  41            47   65535
GDC1 >

GDC1 > ucx sho comm

Communication Parameters

Local host:      gdc1                   Domain:   gd.pta.at

Cluster timer:             5
                                 Maximum     Current        Peak
Interfaces                            20           2           2
Device_sockets                       600          35         172
Routes                             65535         279         280
Services                             200          12         102
Proxies                               20

Type:        FDDI       Free     Maximum   Max Bytes     Minimum   Min Bytes
Large buffers             20         200      947200          10       47360
Small buffers            150        1000      256000          50       12800
IRPs                      20         200
Non UCX buffers           10

Remote Terminal
  Large buffers:          10
  UCBs:                    4
  Virtual term:     disabled
GDC1 >



GDC1 > ucx sho comm/mem
                                   MBUF Summary
                      Small_static  Large_static  Small_dynamic  Large_dynamic
 Total buffers                  50            10            700              0
 Free                            0             6            384              0
 Busy
  Data                           0             4              0              0
  Header                         0             0             22              0
  Socket                         3             0             32              0
  Prot. control                  1             0             27              0
  Route                         44             0            235              0
  Socket name                    0             0              0              0
  Socket options                 0             0              0              0
  Fragment reassembly            0             0              0              0
  IP address                     2             0              0              0
 Size of cluster             13056         47616          53056              0

                Free       Current          Peak          Waits          Drops
 Small Buffers                 366           774              0              0
 Large Buffers                   4            32              0              0
 IRPs             20             0             1              0              0

                    Small clusters  Large clusters    Non UCX buffers
 Free                            1             2              0

GDC1 > sho mem/pool/full
              System Memory Resources on 18-MAR-1997 18:35:05.17

Nonpaged Dynamic Memory      (Lists + Variable)
    Current Size (bytes)      27992064    Current Size (pagelets)      54672
    Initial Size (NPAGEDYN)   27992064    Initial Size (pagelets)      54672
    Maximum Size (NPAGEVIR)  111992832    Maximum Size (pagelets)     218736
    Free Space (bytes)         7585920    Space in Use (bytes)      20406144
    Size of Largest Block      1568000    Size of Smallest Block          64
    Number of Free Blocks        26478    Free Blocks LEQU 64 Bytes     2154
    Free Blocks on Lookasides    20598    Lookaside Space (bytes)    4055296

Paged Dynamic Memory
    Current Size (PAGEDYN)    11878400    Current Size (pagelets)      23200
    Free Space (bytes)         4910256    Space in Use (bytes)       6968144
    Size of Largest Block      4777056    Size of Smallest Block          16
    Number of Free Blocks          383    Free Blocks LEQU 64 Bytes      148
GDC1 >

    There is nothing that comes to mind.
    
    An IPMT would be useful, and be sure to include a DUMP (or a reference
    for us to fetch one) and/or a protocol trace.  [preferably both]