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WARNING: could not open pipe (GetLastError()=2)

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andre.maldonado

Name: André Almeida Maldonado
Posts: 8

2008-09-17 15:08:16 | reply!

Hy all.

When I try to run the indexer:

indexer --all --config C:\busca\Sphinx\imoveis.conf --rotate

I'm getting the error:

WARNING: could not open pipe (GetLastError()=2)

And the index isn't rotated. What can be wrong?

Thank's
Arantor

Name: Pete Spicer
Posts: 4444

to: andre.maldonado, 2008-09-17 16:30:27 | reply!

> Hy all.
>
> When I try to run the indexer:
>
> indexer --all --config C:\busca\Sphinx\imoveis.conf --rotate
>
> I'm getting the error:
>
> WARNING: could not open pipe (GetLastError()=2)
>
> And the index isn't rotated. What can be wrong?
>
> Thank's

I suspect you're using a XMLPipe source and for whatever reason it is unable to open the
connection to it.

Under the source details in your configuration, do you have xmlpipe_command set, and does
it have a command in it that you can run from the command line?

For example, simply having "xmlpipe_command = C:\path\to\myindex.xml" won't work, you
need to give it a command to run.

If your source is a pre-made file, then something like:

xmlpipe_command = type C:\path\to\myindex.xml

would work.
andre.maldonado

Name: André Almeida Maldonado
Posts: 8

to: Arantor, 2008-09-17 17:30:22 | reply!

In fact I have a normal command. The only thing that the indexer can't do is rotate the
index.

When indexer finishes I got a few files with a "new" name, something like this:
imoveis.new.spi

What can I do?
Arantor

Name: Pete Spicer
Posts: 4444

to: andre.maldonado, 2008-09-17 18:30:46 | reply!

> In fact I have a normal command. The only thing that the indexer can't do is rotate the
> index.
>
> When indexer finishes I got a few files with a "new" name, something like this:
> imoveis.new.spi
>
> What can I do?

Well, what the rotate option is doing is switching the files (switching imoveis.new.spi
to imoveis.spi etc) then quick-restarting searchd. In this case, the new index is ready
to roll but isn't being switched in with the old ones being switched out.

It is possible to do this yourself manually, however this isn't practical every time. All
you need to do is stop searchd, rename all the files and then restart it.

A couple of possibilities spring to mind as to why this is happening:

1. searchd has a query that is holding it up (or has hung) so the relevant files are
locked.
2. File permissions for the user running indexer are not enough to delete and rename
files in that folder.
andre.maldonado

Name: André Almeida Maldonado
Posts: 8

to: Arantor, 2008-09-17 18:49:32 | reply!

I'll try what you say, but I think that is possibly something with searchd.pid file. The
only place in the code where this message can be returned is here:

#if USE_WINDOWS
char szPipeName [64];
sprintf ( szPipeName, "\\\\.\\pipe\\searchd_%d", iPID );

HANDLE hPipe = INVALID_HANDLE_VALUE;

while ( hPipe == INVALID_HANDLE_VALUE )
{
        hPipe = CreateFile ( szPipeName, GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL );

        if ( hPipe == INVALID_HANDLE_VALUE )
        {
                if ( GetLastError () != ERROR_PIPE_BUSY )
                {
                        fprintf ( stdout, "WARNING: could not open pipe (GetLastError()=%d)\n", GetLastError () );
                        break;
                }

                if ( !WaitNamedPipe ( szPipeName, 1000 ) )
                {
                        fprintf ( stdout, "WARNING: could not open pipe (GetLastError()=%d)\n", GetLastError () );
                        break;
                }
        }
}

Some clue?

Thank's
Arantor

Name: Pete Spicer
Posts: 4444

to: andre.maldonado, 2008-09-17 19:11:45 | reply!

> I'll try what you say, but I think that is possibly something with searchd.pid file. The
> only place in the code where this message can be returned is here:

Seems to be having trouble opening the PID file then, again possibly a permissions issue,
since IIRC what happens is that the file is updated.

When altering the service via the Services window (in MMC), it's running with the rights
assigned under Windows, however when running as indexer, in all probability it's running
a lower-privileged user that may not have rights to edit the PID file.

Still, as an interim measure, stopping/renaming/restarting should get you going again but
then we can investigate preventing it happening again.

I'd never looked into the mechanics behind this too much; since on my Windows dev box,
for reasons I won't go into, I still use FAT32 and thus all processes can access all
files, and on my Linux production server, searchd and indexer run under a separate user
account.
>
> #if USE_WINDOWS
> char szPipeName [64];
> sprintf ( szPipeName, "\\\\.\\pipe\\searchd_%d", iPID );
>
> HANDLE hPipe = INVALID_HANDLE_VALUE;
>
> while ( hPipe == INVALID_HANDLE_VALUE )
> {
> hPipe = CreateFile ( szPipeName, GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL );
>
> if ( hPipe == INVALID_HANDLE_VALUE )
> {
> if ( GetLastError () != ERROR_PIPE_BUSY )
> {
> fprintf ( stdout, "WARNING: could not open pipe (GetLastError()=%d)\n", GetLastError () );
> break;
> }
>
> if ( !WaitNamedPipe ( szPipeName, 1000 ) )
> {
> fprintf ( stdout, "WARNING: could not open pipe (GetLastError()=%d)\n", GetLastError () );
> break;
> }
> }
> }
>
> Some clue?
>
> Thank's

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