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Feature #8679

Updated by Alfredo Deza over 9 years ago

As discussed at some point, one of the annoyances is to have very cryptic logging messages (cryptic to those who have never seen anything like it
or are developers).

On the #ceph channel a day ago:

<pre>
<user> can anyone help me interpret this line: 7fede0763700 0 -- :/1040921 >> 172.16.17.55:6789/0 pipe(0x7feddc022470 sd=3 :0 s=1 pgs=0 cs=0 l=1 c=0x7feddc0226e0).fault
<other user> the machine youre on is unable to contact the monitor at 172.16.17.55
</pre>



If the machine is unable to contact the monitor, it would be really useful to have something that says that.

<pre>
<user>: hi guys, anyone saw this kind of err msg on the dmesg while trying to map a rbd "feature set mismatch, my 4a042a42 < server's 2004a042a42, missing 20000000000"
<other user>: user: yeah, i've seen this
<other user>: it's because the rbd module in your kernel doesn't support the featrues that are set in crushmap
<other user>: you either need to remove the features
<other user>: or use newer kernel
<user>: other user: and were can i find what feature is causing the issue?
</pre>

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