This bug is created as a clone of upstream ticket:
https://fedorahosted.org/389/ticket/47489

In a replication environment, if the changelog db file name contains extension string multiple times in the file name, the change log file is getting recreated if we perform the db2ldif and ldif2db on the master/hub instance.

Ex: d736e482-198111e1-8d7bedb4-8c53b85f_502ce263000000020000.db4
    In this file name "db4"  is present twice, once as the extension and other one is in the replica name string ("8d7bedb4").

There is a logic problem in the below function where it is trying to find the filename ends with extension. It calls strstr()function to search the "ext" and which returns the first occurrence of the "ext" string in the filename. if the the "ext" string exist multiple times in the file name it returns false always, which result in creating multiple changelog db file. 

====
filename: cl5_api.c

/*
 * return 1: true (the "filename" ends with "ext")
 * return 0: false
 */
static int _cl5FileEndsWith(const char *filename, const char *ext)
{
	char *p = NULL;
	int flen = strlen(filename);
	int elen = strlen(ext);
	if (0 == flen || 0 == elen)
	{
		 return 0;
	}
	p = strstr(filename, ext);
	if (NULL == p)
 	{
		 return 0;
	}
	if (p - filename + elen == flen)
        {
		 return 1;
	}
 	return 0;
}
=====

I have modified this function to fix this issue. Could you please verify the same and include the fix in the master branch?

/*
 * return 1: true (the "filename" ends with "ext")
 * return 0: false
 */
static int _cl5FileEndsWith(const char *filename, const char *ext)
{
	char *p = NULL;
	int flen = strlen(filename);
	int elen = strlen(ext);
	if (0 == flen || 0 == elen)
	{
		return 0;
	}
	p = strstr(filename, ext);
	if (NULL == p)
	{
		return 0;
	}
        
        do {
	    if (p - filename + elen == flen)
	    {
		return 1;
	    }
            p = strstr(p+elen, ext);
        } while ( p != NULL );
 
	return 0;
}
=====

Thanks and Regards,
Jyoti