BDB0075 DB_PAGE_NOTFOUND: Requested page not found

Question

Hello,
If I create a primary and a secondary database within the same BDB database file,
BDB fails with "BDB0075 DB_PAGE_NOTFOUND: Requested page not found". This
happens if the secondary database returns more values (DB_DBT_MULTIPLE).
Down below a testcase. The callback simply creates ngrams, e.g.:
ABCDEFG -> ABC BCD CDE DEF EFG
BDB version: 5.2.28 (most recent), Ubuntu 11.04
Thanks a lot
Josef
#include <stdio.h>
#include <malloc.h>
#include <string.h>
#include <db.h>
#define DATABASE "/tmp/db.db"
static int callback_ngram( DB *secondary, const DBT *key, const DBT *data, DBT *result );
int main(int argc, char *argv[])
    unlink( DATABASE );
    // Open database with a secondary index
    DB *primary;
    for( int i=0; i < 2; ++i )
        DB *handle = NULL;
        int status = db_create( &handle, NULL, 0 );
        if( status != 0 )
            return 1;
        handle->set_lorder( handle, 1234 );
        if( i != 0 )
            handle->set_flags( handle, DB_DUP | DB_DUPSORT );
        handle->set_msgfile( handle, stderr );
        handle->set_errfile( handle, stderr );
        // Open database, name is "0" and "1"
        char dbname[32];
        sprintf(dbname, "%d", i);
        status = handle->open( handle, NULL, DATABASE, dbname, DB_BTREE, DB_CREATE, 0644 );
        if( status != 0 )
            return 1;
        // Associate
        if( i == 0 )
            primary = handle;
        else
            primary->associate( primary, NULL, handle, callback_ngram, DB_CREATE );
    // Insert records
    for( unsigned i=0; i < 100000; ++i )
        char buffer[10];
        for( unsigned j=0; j < sizeof(buffer); ++j )
            buffer[j] = 'A' + (((i + 1) * (j + 1)) % 26);
        //printf("%c%c%c%c%c%c%c%c%c%c\n", buffer[0], buffer[1], buffer[2], buffer[3], buffer[4],
        //                                 buffer[5], buffer[6], buffer[7], buffer[8], buffer[9] );
        // put record
        DBT key;
        memset( &key, 0, sizeof(DBT) );
        key.data = &i;
        key.size = sizeof(i);
        DBT data;
        memset( &data, 0, sizeof(DBT) );
        data.data = buffer;
        data.size = sizeof(buffer);
        int status = primary->put( primary, NULL, &key, &data, 0 );
        if( status == 0 )
            continue;
        fprintf(stderr, "Put failed: %s\n", db_strerror(status));
        return 1;
    return 0;
static int callback_ngram( DB *secondary, const DBT *key, const DBT *data, DBT *result )
    int ngrams = data->size - 2;
    result->data = malloc( sizeof(DBT) * ngrams );
    result->size = ngrams;
    result->flags = DB_DBT_MULTIPLE | DB_DBT_APPMALLOC;
    for( int i=0; i < ngrams; ++i )
        DBT *item = ((DBT*)result->data) + i;
        item->data = ((char*)data->data) + i;
        item->size = 3;
        item->flags = 0;
    return 0;
}

Answer 1

Hello Josef,
I just tried your test case exactly as it (with the addition of printing "done" at the end) on 5.2.28
RHEL and no error is raised:
./test
done
Do I need to do something else to see the error?
Thank you,
Sandra