[sr-dev] [tracker] Task opened: Possible memory leak when processing sht_reload

[sip-router]

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A new Flyspray task has been opened.  Details are below. 

User who did this - i (takeshi) 

Attached to Project - sip-router
Summary - Possible memory leak when processing sht_reload
Task Type - Bug Report
Category - Core
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Normal
Reported Version - Development
Due in Version - Undecided
Due Date - Undecided
Details - I am testing reload of htable using 'kamctl fifo sht_reload TABLE_NAME'
This worked fine before and I could issue thousands of such commands without rest.

But with latest commit ef66bf4ce961a7379bb21e848f70d03defb8864c, it fails after about 40 reloads (using the same config file and '-m 1024') with 
  500 ERROR Reloading data
Setting debug=9 didn't clarify the reason so I attached to the "MI FIFO" process with gdb and verified that it goes out at this point in htable.c (inside function ht_mi_reload):

        nht.entries = (ht_entry_t*)shm_malloc(nht.htsize*sizeof(ht_entry_t));
        if(nht.entries == NULL)
        {
                ht_db_close_con();
                return init_mi_tree(500, MI_ERR_RELOAD, MI_ERR_RELOAD_LEN);
        }

The problem is with shm_malloc() so it seems there is a memory leak.


The configuration is just this:
  # ----- htable params -----
  modparam("htable", "db_url", "mysql://kamailio:kamailioro@localhost/kamailio")
  modparam("htable", "htable", "domain=>size=20;dbtable=htable_domain;")

And I am not processing any calls, I just do 'kamctl fifo sht_reload domain' in a loop.

I even added a sleep of 5 minutes between reloads to see if memory eventually gets freed but it failed just the same:
root at LAB002153:sip-router# for i in $(seq 1 50);do echo $i; kamctl fifo sht_reload domain; sleep 300; done
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500 ERROR Reloading data
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500 ERROR Reloading data
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500 ERROR Reloading data

I got the memory dump after shutting down kamailio. It is too big for pastebin, so I uploaded to a file sharing service:
http://www.filedropper.com/kamailiolog
But I don't know how to interpret this.

More information can be found at the following URL:
http://sip-router.org/tracker/index.php?do=details&task_id=385

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