This article explains the meaning, trigger and impact of the following message on the QFX switches:

Following are often seen in the log messages:

These log messages can be observed at a very high rate since multicast stats support was introduced and the trigger is multicast stats counter retrieval. This is specific to qfx5100, qfx5110, qfx5200 and qfx5120.

With the multicast stats counter support was introduced, two messages were introduced to indicate the success and failure of the multicast stat counter attach, 'Multicast stat ctr attach success' and 'Multicast stat ctr attach failed'.

When the multicast traffic stats collection is done, the device attempts to retrieve the statistics of success and failure and is supposed to log the failure counters to the log messages as error. However, the success counters were also considered as error messages and are being logged on the device. Instead, these were supposed to be logged only when debugged for traces.

As mentioned, these logs indicate success counters and are informational messages without any functional impact on the device as they are mistakenly categorized as error logs.This has been fixed in the following releases:

• junos:14.1X53-D28
• junos:14.1X53-D40
• junos:15.1R5
• junos:16.1R3

You can also suppress repeating non-impacting messages. For instructions, refer to KB9382 - How to prevent certain syslog messages from being written to the log file.