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Trouble starting mnesia on R14B02/3 node with a R14B01 node connected

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Ferenc Holzhauser

Trouble starting mnesia on R14B02/3 node with a R14B01 node connected

Hi,

After updating Erlang from R14B01 to R14B02 (or B03, tried both) on one node of a 2 node setup I had trouble starting mnesia.

Eshell V5.8.3 (abort with ^G)
(node2)1> mnesia:start().

=ERROR REPORT==== 26-May-2011::13:54:06 ===
Mnesia('node2'): ** ERROR ** (core dumped to file: "/home/me/backend/MnesiaCore.node2_1306_410846_451973")
** FATAL ** Failed to merge schema: {aborted,
                                      {function_clause,
                                       [{mnesia_schema,cs2list,
                                         [{cstruct,schema,set,[],
                                           ['node2',
                                            'node1'],
                                           [],0,read_write,[],[],false,schema,
                                           [table,cstruct],
                                           [],[],
                                           {{1300,896724,827143},
                                            'node1'},
                                           {{4,0},
                                            {'node2',
                                             {1302,780884,609311}}}}]},
                                        {mnesia_schema,do_merge_schema,1},
                                        {mnesia_tm,apply_fun,3},
                                        {mnesia_tm,execute_transaction,5},
                                        {mnesia_schema,schema_coordinator,
                                         3}]}}


At the end I stopped both nodes, updated Erlang then I could start both of them.

Is it a bug or did I do something wrong when trying to update them one by one?

Thanks in advance,
Ferenc

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Dan Gudmundsson-2

Re: Trouble starting mnesia on R14B02/3 node with a R14B01 node connected

That is a bug in R14B03, I currently fail to understand how it can go wrong on R14B02..

Did you try R14B03 first?

There is a missing make rule, which doesn't trigger a remake if the .hrl file is updated,

old clearcase problem which fixed those kind of build dependencies automagicly.

/Dan

On Mon, May 30, 2011 at 11:59 AM, Ferenc Holzhauser <[hidden email]> wrote:

Hi,

After updating Erlang from R14B01 to R14B02 (or B03, tried both) on one node of a 2 node setup I had trouble starting mnesia.

Eshell V5.8.3 (abort with ^G)
(node2)1> mnesia:start().

=ERROR REPORT==== 26-May-2011::13:54:06 ===
Mnesia('node2'): ** ERROR ** (core dumped to file: "/home/me/backend/MnesiaCore.node2_1306_410846_451973")
** FATAL ** Failed to merge schema: {aborted,
                                      {function_clause,
                                       [{mnesia_schema,cs2list,
                                         [{cstruct,schema,set,[],
                                           ['node2',
                                            'node1'],
                                           [],0,read_write,[],[],false,schema,
                                           [table,cstruct],
                                           [],[],
                                           {{1300,896724,827143},
                                            'node1'},
                                           {{4,0},
                                            {'node2',
                                             {1302,780884,609311}}}}]},
                                        {mnesia_schema,do_merge_schema,1},
                                        {mnesia_tm,apply_fun,3},
                                        {mnesia_tm,execute_transaction,5},
                                        {mnesia_schema,schema_coordinator,
                                         3}]}}


At the end I stopped both nodes, updated Erlang then I could start both of them.

Is it a bug or did I do something wrong when trying to update them one by one?

Thanks in advance,
Ferenc

_______________________________________________
erlang-questions mailing list
[hidden email]
http://erlang.org/mailman/listinfo/erlang-questions

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Ferenc Holzhauser

Re: Trouble starting mnesia on R14B02/3 node with a R14B01 node connected

Yes, I did try R14B03 first then R14B02 to see if that works.

BR,
Ferenc

On 30 May 2011 15:00, Dan Gudmundsson <[hidden email]> wrote:

That is a bug in R14B03, I currently fail to understand how it can go wrong on R14B02..

Did you try R14B03 first?

There is a missing make rule, which doesn't trigger a remake if the .hrl file is updated,

old clearcase problem which fixed those kind of build dependencies automagicly.

/Dan

On Mon, May 30, 2011 at 11:59 AM, Ferenc Holzhauser <[hidden email]> wrote:

Hi,

After updating Erlang from R14B01 to R14B02 (or B03, tried both) on one node of a 2 node setup I had trouble starting mnesia.

Eshell V5.8.3 (abort with ^G)
(node2)1> mnesia:start().

=ERROR REPORT==== 26-May-2011::13:54:06 ===
Mnesia('node2'): ** ERROR ** (core dumped to file: "/home/me/backend/MnesiaCore.node2_1306_410846_451973")
** FATAL ** Failed to merge schema: {aborted,
                                      {function_clause,
                                       [{mnesia_schema,cs2list,
                                         [{cstruct,schema,set,[],
                                           ['node2',
                                            'node1'],
                                           [],0,read_write,[],[],false,schema,
                                           [table,cstruct],
                                           [],[],
                                           {{1300,896724,827143},
                                            'node1'},
                                           {{4,0},
                                            {'node2',
                                             {1302,780884,609311}}}}]},
                                        {mnesia_schema,do_merge_schema,1},
                                        {mnesia_tm,apply_fun,3},
                                        {mnesia_tm,execute_transaction,5},
                                        {mnesia_schema,schema_coordinator,
                                         3}]}}


At the end I stopped both nodes, updated Erlang then I could start both of them.

Is it a bug or did I do something wrong when trying to update them one by one?

Thanks in advance,
Ferenc

_______________________________________________
erlang-questions mailing list
[hidden email]
http://erlang.org/mailman/listinfo/erlang-questions

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Brian Acton

Re: Trouble starting mnesia on R14B02/3 node with a R14B01 node connected

Hi,

We are similarly affected by this issue.

We have a cluster of nodes running stock R14B01

We upgraded one node from R14B01 to R14B03.

When we start mnesia, we get the same 'Failed to Merge Schema' error message that Ferenc got when he tried.

Is there a solution for this? Does someone have a patch somewhere on github?

For us, we can not take the downtime to convert the whole cluster at one time. We need to be able to restart one server at a time.

Any info, pointers, or help appreciated.

Thx,

--b

On Mon, May 30, 2011 at 6:17 AM, Ferenc Holzhauser <[hidden email]> wrote:

Yes, I did try R14B03 first then R14B02 to see if that works.

BR,
Ferenc

On 30 May 2011 15:00, Dan Gudmundsson <[hidden email]> wrote:

That is a bug in R14B03, I currently fail to understand how it can go wrong on R14B02..

Did you try R14B03 first?

There is a missing make rule, which doesn't trigger a remake if the .hrl file is updated,

old clearcase problem which fixed those kind of build dependencies automagicly.

/Dan

On Mon, May 30, 2011 at 11:59 AM, Ferenc Holzhauser <[hidden email]> wrote:

Hi,

After updating Erlang from R14B01 to R14B02 (or B03, tried both) on one node of a 2 node setup I had trouble starting mnesia.

Eshell V5.8.3 (abort with ^G)
(node2)1> mnesia:start().

=ERROR REPORT==== 26-May-2011::13:54:06 ===
Mnesia('node2'): ** ERROR ** (core dumped to file: "/home/me/backend/MnesiaCore.node2_1306_410846_451973")
** FATAL ** Failed to merge schema: {aborted,
                                      {function_clause,
                                       [{mnesia_schema,cs2list,
                                         [{cstruct,schema,set,[],
                                           ['node2',
                                            'node1'],
                                           [],0,read_write,[],[],false,schema,
                                           [table,cstruct],
                                           [],[],
                                           {{1300,896724,827143},
                                            'node1'},
                                           {{4,0},
                                            {'node2',
                                             {1302,780884,609311}}}}]},
                                        {mnesia_schema,do_merge_schema,1},
                                        {mnesia_tm,apply_fun,3},
                                        {mnesia_tm,execute_transaction,5},
                                        {mnesia_schema,schema_coordinator,
                                         3}]}}


At the end I stopped both nodes, updated Erlang then I could start both of them.

Is it a bug or did I do something wrong when trying to update them one by one?

Thanks in advance,
Ferenc

_______________________________________________
erlang-questions mailing list
[hidden email]
http://erlang.org/mailman/listinfo/erlang-questions

_______________________________________________
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[hidden email]
http://erlang.org/mailman/listinfo/erlang-questions

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Dan Gudmundsson-2

Re: Trouble starting mnesia on R14B02/3 node with a R14B01 node connected

You have to back out Ulf majority patches, from R14B03 branch I have not

made it yet but will do in R14B04, plus add some code so we can introduce the

functionality in R15.

Sorry I messed up the testing on that patch, it shouldn't have been included

since both I and Ulf miss-interpreted how the schema upgrade code worked,

it didn't.

/Dan

On Sun, Jun 26, 2011 at 10:05 PM, Brian Acton <[hidden email]> wrote:

Hi,

We are similarly affected by this issue.

We have a cluster of nodes running stock R14B01

We upgraded one node from R14B01 to R14B03.

When we start mnesia, we get the same 'Failed to Merge Schema' error message that Ferenc got when he tried.

Is there a solution for this? Does someone have a patch somewhere on github?

For us, we can not take the downtime to convert the whole cluster at one time. We need to be able to restart one server at a time.

Any info, pointers, or help appreciated.

Thx,

--b

On Mon, May 30, 2011 at 6:17 AM, Ferenc Holzhauser <[hidden email]> wrote:

Yes, I did try R14B03 first then R14B02 to see if that works.

BR,
Ferenc

On 30 May 2011 15:00, Dan Gudmundsson <[hidden email]> wrote:

That is a bug in R14B03, I currently fail to understand how it can go wrong on R14B02..

Did you try R14B03 first?

There is a missing make rule, which doesn't trigger a remake if the .hrl file is updated,

old clearcase problem which fixed those kind of build dependencies automagicly.

/Dan

On Mon, May 30, 2011 at 11:59 AM, Ferenc Holzhauser <[hidden email]> wrote:

Hi,

After updating Erlang from R14B01 to R14B02 (or B03, tried both) on one node of a 2 node setup I had trouble starting mnesia.

Eshell V5.8.3 (abort with ^G)
(node2)1> mnesia:start().

=ERROR REPORT==== 26-May-2011::13:54:06 ===
Mnesia('node2'): ** ERROR ** (core dumped to file: "/home/me/backend/MnesiaCore.node2_1306_410846_451973")
** FATAL ** Failed to merge schema: {aborted,
                                      {function_clause,
                                       [{mnesia_schema,cs2list,
                                         [{cstruct,schema,set,[],
                                           ['node2',
                                            'node1'],
                                           [],0,read_write,[],[],false,schema,
                                           [table,cstruct],
                                           [],[],
                                           {{1300,896724,827143},
                                            'node1'},
                                           {{4,0},
                                            {'node2',
                                             {1302,780884,609311}}}}]},
                                        {mnesia_schema,do_merge_schema,1},
                                        {mnesia_tm,apply_fun,3},
                                        {mnesia_tm,execute_transaction,5},
                                        {mnesia_schema,schema_coordinator,
                                         3}]}}


At the end I stopped both nodes, updated Erlang then I could start both of them.

Is it a bug or did I do something wrong when trying to update them one by one?

Thanks in advance,
Ferenc

_______________________________________________
erlang-questions mailing list
[hidden email]
http://erlang.org/mailman/listinfo/erlang-questions

_______________________________________________
erlang-questions mailing list
[hidden email]
http://erlang.org/mailman/listinfo/erlang-questions

_______________________________________________
erlang-questions mailing list
[hidden email]
http://erlang.org/mailman/listinfo/erlang-questions