Hello, everyone)

When I tried to use regular expressions in preprocessing form, I found that Zabbix could not find the second occurrence (second escape sequence) of the regular expression.

Example (file monitoring):

{
    "outcome" => "success",
    "result" => {
        "heap-memory-usage" => {
            "init" => 2147483648L,
            "used" => 50779204512L,
            "committed" => 75376689152L,
            "max" => 75376689152L
        },
        "non-heap-memory-usage" => {
            "init" => 2555904L,
            "used" => 390467544L,
            "committed" => 405086208L,
            "max" => -1L
        },
        "object-name" => "java.lang:type=Memory",
        "object-pending-finalization-count" => 0,
        "verbose" => true
    }
}

My regular expr is like:

committed.*\s(\S+)L

Previously, I checked the functionality of the regular expression on the site regex 101.com

https://regex101.com/delete/hd9sQqB2FfUmM2WpKtd1KXAW 

After that I made this one:

and it's OK (nice), but when I'm trying to make something like this (using \2 for finding second occurrence) :

Zabbix app tells me that it fails on it step...

On Zabbix off  website page: https://www.zabbix.com/documentation/current/manual/config/items/preprocessing 

Where am I wrong? I ask for your help.