PowerPath for Linux: Missing libjson-c.so.2 shared library prevents service startup

Summary: The message "Error while loading shared libraries: libjson-c.so.2: cannot open shared object file: No such file or directory" appears when enabling the Remote Management Service or PowerPath service on the PowerPath Linux host. ...

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Symptoms

The PowerPath Linux host cannot connect to PowerPath Management Appliance (PPMA) as the PowerPath Management service cannot start per the following error:

Mar 30 12:26:35 ner02or-00471 emcp_mond.sh: /sbin/emcp_mond: error while loading shared libraries: libjson-c.so.2: cannot open shared object file: No such file or directory
Mar 30 12:26:35 ner02or-00471 root: emcp_mond.sh: Error starting PowerPath Management Daemon
Mar 30 12:26:35 ner02or-00471 emcp_mond.sh: Error starting PowerPath Management Daemon

Cause

This is due to libjson-c.so.2 libraries not being installed on the Linux host.

In Red Hat Enterprise Linux 7.5, json-c is not installed by default in the minimal installation, and it is advised to install the package separately.

Resolution

It is advised to install json-c libraries separately and start the PowerPath Management service afterwards when the PowerPath Linux host can be added to PPMA.

Additional Information

This is also documented in the PowerPath documentation.

Affected Products

PowerPath for Linux
Article Properties
Article Number: 000198393
Article Type: Solution
Last Modified: 13 May 2026
Version:  11
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