php curl nss initialize error -

i use php curl visit https website such "https://api.mch.weixin.qq.com" in php-fpm environment, code is:

    <?php     $ch = curl_init();     curl_setopt($ch, curlopt_timeout, 10);     curl_setopt($ch, curlopt_url, 'https://api.mch.weixin.qq.com');     curl_setopt($ch, curlopt_ssl_verifypeer, false);     curl_setopt($ch, curlopt_ssl_verifyhost, false);     curl_setopt($ch, curlopt_header, false);     curl_setopt($ch, curlopt_verbose, 1);     $verbose = fopen('php://temp', 'w+');     curl_setopt($ch, curlopt_stderr, $verbose);     curl_setopt($ch, curlopt_post, true );     curl_setopt($ch, curlopt_postfields, 'test');     $data = curl_exec($ch );     if ($data === false) {         $error = curl_errno($ch) . ' ' . curl_error($ch);         echo $error;         rewind($verbose);         $verboselog = stream_get_contents($verbose);         echo "verbose information:\n<pre>", htmlspecialchars($verboselog), "</pre>\n";     } else {         echo 'ok';     } 

the verbose info is:

    * connect() api.mch.weixin.qq.com port 443 (#0)     *   trying 101.226.129.200... * connected     * connected api.mch.weixin.qq.com (101.226.129.200) port 443 (#0)     * initializing nss certpath: sql:/etc/pki/nssdb     * unable initialize nss database     * initializing nss certpath: none     * unable initialize nss     * nss error -5925     * closing connection #0     * problem ssl ca cert (path? access rights?) 

the above error not happend, , after restart php-fpm, ok.

what error? how solve it?

note: havent update centos os recently.

i found if move either 1 of these 2 file away, problem occured:

/usr/lib64/libsoftokn3.so /usr/lib64/libsqlite3.so.0  

but these 2 file there.

my curl version is:

    # curl --version     curl 7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 nss/3.15.3 zlib/1.2.3 libidn/1.18 libssh2/1.4.2     protocols: tftp ftp telnet dict ldap ldaps http file https ftps scp sftp     features: gss-negotiate idn ipv6 largefile ntlm ssl libz 

my os is:

    linux web-www 2.6.32-431.el6.x86_64 #1 smp fri nov 22 03:15:09 utc 2013 x86_64 x86_64 x86_64 gnu/linux