Isilon OneFS: "lwmsg_call_dispatch" Error Occurs When Running "isi services" Command on the Cluster

Summary: Running the "isi services -a/-l" command returns an error: "lwmsg_call_dispatch failed: 16"

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Symptoms

When users run command "isi services -a/-l" to list the services running on the cluster, they get below error:

Cluster-2# isi services -a
Available Services:
lwmsg_call_dispatch failed: 16

 

Cause

This is because of mcp process is not running on the cluster.

 

Resolution

  1. Check whether the mcp process is running on the cluster or not

    Cluster-2# isi_for_array -s ps -auxww | grep -i mcp | grep -v grep
Cluster-2#

  2. Start the mcp process on the cluster

    Cluster-2# isi_for_array -s isi_mcp
Cluster-2#

  3. Verify the mcp process

    Cluster-2# isi_for_array -s ps -auxww | grep -i mcp | grep -v grep
Cluster-1: root   76482   2.0  0.6 152080 11884  -  Is   10:38PM    0:01.44 isi_mcp: master (isi_mcp)
Cluster-1: root   76478   0.0  0.5 150156 10248  -  Is   10:38PM    0:00.03 isi_mcp: failsafe (isi_mcp)
Cluster-1: root   76480   0.0  0.5 149900 10260  -  Ss   10:38PM    0:00.00 isi_mcp: forker (isi_mcp)
Cluster-2: root   55647   1.0  0.6 152080 12512  -  Is   10:38PM    0:01.00 isi_mcp: master (isi_mcp)
Cluster-2: root   55643   0.0  0.5 150156 10888  -  Is   10:38PM    0:00.03 isi_mcp: failsafe (isi_mcp)
Cluster-2: root   55645   0.0  0.5 149644 10848  -  Is   10:38PM    0:00.00 isi_mcp: forker (isi_mcp)
Cluster-2#

 

Affected Products

PowerScale OneFS

Products

PowerScale OneFS
Article Properties
Article Number: 000050177
Article Type: Solution
Last Modified: 03 Mar 2026
Version:  4
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