Hello Willy, I have just upgraded HAProxy from 1.4.18 to 1.4.20 and it looks like the problem occurs when enabling servers only.
2012-03-15 08:13:55,191 Disabling reserves 2012-03-15 08:13:55,191 disable server www/i-95f89df1 ; disable server www/i-8bf89def ; disable server www/i-97f89df3 .... 2012-03-15 08:14:18,112 Enabling reserves 2012-03-15 08:14:18,113 enable server www/i-95f89df1 ; enable server www/i-8bf89def ; enable server www/i-97f89df3 2012-03-15 08:14:18,113 Expected 5 active serves, have 2, calling change_state() again 2012-03-15 08:14:18,113 enable server www/i-95f89df1 ; enable server www/i-8bf89def ; enable server www/i-97f89df3 ... 012-03-15 08:14:53,963 Enabling reserves 2012-03-15 08:14:53,963 enable server www/i-95f89df1 ; enable server www/i-8bf89def ; enable server www/i-97f89df3 2012-03-15 08:14:53,964 Expected 5 active serves, have 2, calling change_state() again 2012-03-15 08:14:53,964 enable server www/i-95f89df1 ; enable server www/i-8bf89def ; enable server www/i-97f89df3 ..... 2012-03-15 08:14:54,971 Disabling reserves 2012-03-15 08:14:54,972 disable server www/i-95f89df1 ; disable server www/i-8bf89def ; disable server www/i-97f89df3 .... 2012-03-15 08:15:45,289 Enabling reserves 2012-03-15 08:15:45,290 enable server www/i-95f89df1 ; enable server www/i-8bf89def ; enable server www/i-97f89df3 <---- enabling works fine ... 2012-03-15 08:15:46,297 Disabling reserves 2012-03-15 08:15:46,297 disable server www/i-95f89df1 ; disable server www/i-8bf89def ; disable server www/i-97f89df3 Michele On Mar 15, 2012, at 8:46 AM, Willy Tarreau wrote: > Hi Michele, > > On Wed, Mar 14, 2012 at 01:07:51PM +0200, Michele Mazzucco wrote: >> Hello Willy, >> >> I have tried to follow your advice, but it didn't solve the matter -- it >> looks like the problem is not the web interface. >> After executing the code above, I use a different socket to retrieve the >> stats and check that the number of active servers corresponds to the expected >> one. >> This is the log >> >> >> 2012-03-14 10:50:56,568 Enabling reserves >> 2012-03-14 10:50:56,568 enable server www/i-932dbef7 >> <-- command sent over the socket >> 2012-03-14 10:50:56,569 Expected 5 active serves, have 4, calling >> change_state() again >> 2012-03-14 10:50:56,569 enable server www/i-932dbef7 >> <--- command sent over the socket >> ... server enabled > > Just to be sure, is it the disabling of servers which causes trouble or > enabling them back ? > > I'm asking because we (very) recently fixed an issues related to servers > leaving maintenance mode which was introduced by fixing another issue with > server tracking, but the regression did not affect any 1.4 releases. > However, since both fixes have been backported into 1.4.20, it is possible > there was another corner case we did not identify and which is solved now. > > Just in case, would you please check if 1.4.20 still behaves the same ? > Maybe we're trying to troubleshoot an already fixed issue. > > Regards, > Willy >
