Broken dependency in percona-xtradb-cluster-server-5.6

[Dr. Jens Harbott]

After upgrading percona-xtradb-cluster-server-5.6 on xenial from 5.6.32-78.1-56 to 5.6.35-26.20-2.xenial we see this error when starting the server:

2017-04-20 14:55:29 5978 [ERROR] WSREP: provider interface version mismatch: need '26', found '25'
2017-04-20 14:55:29 5978 [ERROR] WSREP: wsrep_load(): interface version mismatch: my version 26, provider version 25
2017-04-20 14:55:29 5978 [ERROR] WSREP: wsrep_load(/usr/lib/libgalera_smm.so) failed: Invalid argument (22). Reverting to no provider.

As a result, the server runs in standalone mode, leading to some interesting results.

However, the dependency for this pkg explicitly lists:

  Depends: <percona-xtradb-cluster-galera-25>

Only when I install the wrapper package percona-xtradb-cluster-56, the correct dependency percona-xtradb-cluster-galera-3 is installed, but giving this warning:

dpkg: galera-3: dependency problems, but removing anyway as you requested:
 percona-xtradb-cluster-server-5.6 depends on percona-xtradb-cluster-galera-25; however:
  Package percona-xtradb-cluster-galera-25 is not installed.
  Package galera-3 which provides percona-xtradb-cluster-galera-25 is to be removed.

[EvgeniyPatlan (evgeniy-patlan)]

Could you please provide a bit more information regarding your case:
Exact version of installed package before the update (you have provided 5.6.32-78.1-56 but we have 5.6.32-25.17)
What percona packages were installed
How did you performed upgrade.

I have tried to reproduce the issue (upgrade - 5.6.32-25.17 to 5.6.35-26.20) and everything worked as expected.

[Dr. Jens Harbott (j-harbott)]

The problem appears when percona-xtradb-cluster-56 is not installed, only percona-xtradb-cluster-server-5.6. The old version I am upgrading from is 5.6.21-25.8-0ubuntu3.2, sorry for the wrong version information.

Due to the bad dependency, during the upgrade galera-3=25.3.14-1 gets installed instead of percona-xtradb-cluster-galera-3.x=3.20-3.xenial.

The command for the upgrade is

apt-get -q -y install percona-xtradb-cluster-server-5.6=5.6.35-26.20-3.xenial

and according to the apt history log it installs these packages:

libcurl3:amd64 (7.47.0-1ubuntu2.2, automatic), iproute:amd64 (1:4.3.0-1ubuntu3, automatic), libev4:amd64 (1:4.22-1, automatic), libdbi-perl:amd64 (1.634-1build1, automatic), libaio1:amd64 (0.3.110-2, automatic), percona-xtradb-cluster-common-5.6:amd64 (5.6.35-26.2
0-3.xenial, automatic), percona-xtradb-cluster-server-5.6:amd64 (5.6.35-26.20-3.xenial), percona-xtradb-cluster-client-5.6:amd64 (5.6.35-26.20-3.xenial, automatic), galera-3:amd64 (25.3.14-1, automatic), percona-xtrabackup:amd64 (2.3.8-1.xenial, automatic), libdbd-mysql-pe
rl:amd64 (4.033-1ubuntu0.1, automatic), socat:amd64 (1.7.3.1-1, automatic)

As a fix I did

apt install percona-xtradb-cluster-56

and this then installs

percona-xtradb-cluster-galera-3.x:amd64 (3.20-3.xenial, automatic), percona-xtradb-cluster-galera-3:amd64 (3.20-3.xenial, automatic), percona-xtradb-cluster-56:amd64 (5.6.35-26.20-3.xenial)

[Sveta Smirnova (svetasmirnova)]

Thank you for the report.

Verified as described.

To repeat no need to upgrade: just install percona-xtradb-cluster-server-5.6 package and it will install incompatible galera3 package. Installing percona-xtradb-cluster-56 fixes the issue (and removes galera3 package)

[Sveta Smirnova (svetasmirnova)]

Not repeatable with version 5.7

[EvgeniyPatlan (evgeniy-patlan)]

Fixed here: https://github.com/percona/percona-xtradb-cluster/pull/459/commits/657c9414d72ff634c180e2d03428964dfd241d4d

[Shahriyar Rzayev (rzayev-sehriyar)]

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PXC-1971