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<pre>Version: drbd-9.0.21-1</pre>
<pre>Layout: drbd.res within 3 nodes -- node-1(Secondary), node-2(Primary), node-3(Secondary)</pre>
<pre>Description:
a.reboot node-2 when cluster is working.
b.re-up the drbd.res on node-2 after it restarted.
c.an expected resync from node-3 to node-2 happens. When the resync is done, however,
node-1 raises an unexpected WFBitMapS repl status and can't recover to normal anymore.
Status output:
</pre>
<p style="margin: 10px 0px 0px; padding: 0px; font-style: normal;
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word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><font size="-1">node-1:
drbdadm status</font></p>
<font size="-1"> </font>
<p style="margin: 10px 0px 0px; padding: 0px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: normal; letter-spacing: normal; text-align: start;
text-indent: 0px; text-transform: none; white-space: normal;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><font size="-1">drbd6
role:Secondary</font></p>
<font size="-1"> </font>
<p style="margin: 10px 0px 0px; padding: 0px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: normal; letter-spacing: normal; text-align: start;
text-indent: 0px; text-transform: none; white-space: normal;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><font size="-1">disk:UpToDate</font></p>
<font size="-1"> </font>
<p style="margin: 10px 0px 0px; padding: 0px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: normal; letter-spacing: normal; text-align: start;
text-indent: 0px; text-transform: none; white-space: normal;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><font size="-1">hotspare
connection:Connecting</font></p>
<font size="-1"> </font>
<p style="margin: 10px 0px 0px; padding: 0px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: normal; letter-spacing: normal; text-align: start;
text-indent: 0px; text-transform: none; white-space: normal;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><font size="-1">node-2
role:Primary</font></p>
<font size="-1"> </font>
<p style="margin: 10px 0px 0px; padding: 0px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: normal; letter-spacing: normal; text-align: start;
text-indent: 0px; text-transform: none; white-space: normal;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><font size="-1">replication:WFBitMapS
peer-disk:Consistent</font></p>
<font size="-1"> </font>
<p style="margin: 10px 0px 0px; padding: 0px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: normal; letter-spacing: normal; text-align: start;
text-indent: 0px; text-transform: none; white-space: normal;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><font size="-1">node-3
role:Secondary</font></p>
<font size="-1"> </font>
<p style="margin: 10px 0px 0px; padding: 0px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: normal; letter-spacing: normal; text-align: start;
text-indent: 0px; text-transform: none; white-space: normal;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><font size="-1">peer-disk:UpToDate</font></p>
<font size="-1"> </font>
<p style="margin: 10px 0px 0px; padding: 0px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: normal; letter-spacing: normal; text-align: start;
text-indent: 0px; text-transform: none; white-space: normal;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><font size="-1"><br>
</font> </p>
<font size="-1"> </font>
<p style="margin: 10px 0px 0px; padding: 0px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: normal; letter-spacing: normal; text-align: start;
text-indent: 0px; text-transform: none; white-space: normal;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><font size="-1">node-2:
drbdadm status</font></p>
<font size="-1"> </font>
<p style="margin: 10px 0px 0px; padding: 0px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: normal; letter-spacing: normal; text-align: start;
text-indent: 0px; text-transform: none; white-space: normal;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><font size="-1">drbd6
role:Primary</font></p>
<font size="-1"> </font>
<p style="margin: 10px 0px 0px; padding: 0px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: normal; letter-spacing: normal; text-align: start;
text-indent: 0px; text-transform: none; white-space: normal;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><font size="-1">disk:UpToDate</font></p>
<font size="-1"> </font>
<p style="margin: 10px 0px 0px; padding: 0px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: normal; letter-spacing: normal; text-align: start;
text-indent: 0px; text-transform: none; white-space: normal;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><font size="-1">hotspare
connection:Connecting</font></p>
<font size="-1"> </font>
<p style="margin: 10px 0px 0px; padding: 0px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: normal; letter-spacing: normal; text-align: start;
text-indent: 0px; text-transform: none; white-space: normal;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><font size="-1">node-1
role:Secondary</font></p>
<font size="-1"> </font>
<p style="margin: 10px 0px 0px; padding: 0px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: normal; letter-spacing: normal; text-align: start;
text-indent: 0px; text-transform: none; white-space: normal;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><font size="-1">peer-disk:UpToDate</font></p>
<font size="-1"> </font>
<p style="margin: 10px 0px 0px; padding: 0px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: normal; letter-spacing: normal; text-align: start;
text-indent: 0px; text-transform: none; white-space: normal;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><font size="-1">node-3
role:Secondary</font></p>
<font size="-1"> </font>
<p style="margin: 10px 0px 0px; padding: 0px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: normal; letter-spacing: normal; text-align: start;
text-indent: 0px; text-transform: none; white-space: normal;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial;"><font size="-1">peer-disk:UpToDate</font><tt><br>
</tt></p>
<pre><tt>I assume that there is a process sequence below according to my source code version:
node-1 node-2 node-3
restarted with CRASHED_PRIMARY
start sync with node-3 as target start sync with node-2 as source
бн бн
end sync with node-3 end sync with node-2
w_after_state_change
loop 1 within for loop against node-1:(a)</tt>
<tt><tt>receive_uuids10 </tt>send uuid with UUID_FLAG_GOT_STABLE&</tt><tt><tt>CRASHED_PRIMARY</tt> to node-1</tt>
<tt><tt>receive uuid of node-2 with CRASHED_PRIMARY</tt> loop 2 within for loop against node-3:
clear CRASHED_PRIMARY(b)
send uuid to node-2 with UUID_FLAG_RESYNC </tt><tt><tt>receive uuids10</tt>
</tt><tt><tt>sync_handshake</tt> to SYNC_SOURCE_IF_BOTH_FAILED </tt><tt><tt>sync_handshake to NO_SYNC</tt>
change repl state to </tt><tt>WFBitMapS
The key problem is about the order of step(a) and step(b), that is, node-2 sends the
unexpected </tt><tt><tt><tt>CRASHED_PRIMARY</tt> to node-1 though it's actually no longer a crashed primary
after syncing with node-3.</tt></tt><tt><tt>
So may I have the below questions:
a.If this is really a BUG or just an expected result?
b.If there's already a patch fix within the newest verion?
c.If there's some workaround method against this kind of unexcepted status, since I really
meet so many other problems like that :(
</tt></tt></pre>
<pre class="moz-signature" cols="72">--
Sincerely Yours,
Zhang Duan</pre>
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