Linux-php slow log always has a ++ dumpfailed Error

Php slow log always has a ++ dumpfailed error. I did not find the answer after I searched the internet. I hope you can give me some advice. The detailed log is as follows: [17-Dec-201516: 28: 30] [poolwww] pid29220script_filenamevarttmm.php [0x00000000023b6990] curl _... php slow log always has a ++ dump failed error. I did not find the answer after I searched the internet. I hope you can give me some advice.

The detailed log is as follows:
[17-Dec-2015 16:28:30] [pool www] pid 29220
Script_filename =/var/tt/mm. php
[0x00000000023b6990] curl_exec ()/var/tt/my. php: 20
[0x00000000023b5088] http_request_json ()/var/tt/mm/login. php: 75
[0x00000000023b4a20] ++ dump failed

[17-Dec-2015 16:29:54] [pool www] pid 29544
Script_filename =/var/tt/mm_reg.php
[0x00000000022231c0] curl_exec ()/var/tt/my. php: 20
[0x0000000002220ae0] http_request_json ()/var/tt/mm_reg.php: 235

[17-Dec-2015 16:36:19] [pool www] pid 20815
Script_filename =/var/tt/mm_reg.php
[0x00000000023b7160] curl_exec ()/var/tt/my. php: 20
[0x00000000023b4a80] http_request_json ()/var/tt/mm_reg.php: 235

[17-Dec-2015 16:48:46] [pool www] pid 27734
Script_filename =/var/tt/mm. php
[0x00000000023b69f0] curl_exec ()/var/tt/my. php: 20
[0x00000000023b50e8] http_request_json ()/var/tt/mm/login. php: 75
[0x00000000023b4a80] ++ dump failed

[17-Dec-2015 17:02:26] [pool www] pid 3215
Script_filename =/var/tt/mm_reg.php
[0x0000000002370800] curl_exec ()/var/tt/my. php: 20
[0x000000000236e120] http_request_json ()/var/tt/mm_reg.php: 235

[17-Dec-2015 17:08:39] [pool www] pid 5503
Script_filename =/var/tt/mm. php
[0x00000000023a87a0] curl_exec ()/var/tt/my. php: 20
[0x00000000023a6e98] http_request_json ()/var/tt/mm/login. php: 75
[0x00000000023a6830] ++ dump failed

[17-Dec-2015 17:12:04] [pool www] pid 6592
Script_filename =/var/tt/mm. php
[0x00000000023b69f0] curl_exec ()/var/tt/my. php: 20
[0x00000000023b50e8] http_request_json ()/var/tt/mm/login. php: 75
[0x00000000023b4a80] ++ dump failed

[17-Dec-2015 17:31:51] [pool www] pid 19806
Script_filename =/var/tt/mm_reg.php
[0x00000000023707d0] curl_exec ()/var/tt/my. php: 20
[0x000000000236e0f0] http_request_json ()/var/tt/mm_reg.php: 235
[Root @ iZ286xgh6itZ log] # ++ dump failed

Reply content:

Php slow log always has a ++ dump failed error. I did not find the answer after I searched the internet. I hope you can give me some advice.

The detailed log is as follows:
[17-Dec-2015 16:28:30] [pool www] pid 29220
Script_filename =/var/tt/mm. php
[0x00000000023b6990] curl_exec ()/var/tt/my. php: 20
[0x00000000023b5088] http_request_json ()/var/tt/mm/login. php: 75
[0x00000000023b4a20] ++ dump failed

[17-Dec-2015 16:29:54] [pool www] pid 29544
Script_filename =/var/tt/mm_reg.php
[0x00000000022231c0] curl_exec ()/var/tt/my. php: 20
[0x0000000002220ae0] http_request_json ()/var/tt/mm_reg.php: 235

[17-Dec-2015 16:36:19] [pool www] pid 20815
Script_filename =/var/tt/mm_reg.php
[0x00000000023b7160] curl_exec ()/var/tt/my. php: 20
[0x00000000023b4a80] http_request_json ()/var/tt/mm_reg.php: 235

[17-Dec-2015 16:48:46] [pool www] pid 27734
Script_filename =/var/tt/mm. php
[0x00000000023b69f0] curl_exec ()/var/tt/my. php: 20
[0x00000000023b50e8] http_request_json ()/var/tt/mm/login. php: 75
[0x00000000023b4a80] ++ dump failed

[17-Dec-2015 17:02:26] [pool www] pid 3215
Script_filename =/var/tt/mm_reg.php
[0x0000000002370800] curl_exec ()/var/tt/my. php: 20
[0x000000000236e120] http_request_json ()/var/tt/mm_reg.php: 235

[17-Dec-2015 17:08:39] [pool www] pid 5503
Script_filename =/var/tt/mm. php
[0x00000000023a87a0] curl_exec ()/var/tt/my. php: 20
[0x00000000023a6e98] http_request_json ()/var/tt/mm/login. php: 75
[0x00000000023a6830] ++ dump failed

[17-Dec-2015 17:12:04] [pool www] pid 6592
Script_filename =/var/tt/mm. php
[0x00000000023b69f0] curl_exec ()/var/tt/my. php: 20
[0x00000000023b50e8] http_request_json ()/var/tt/mm/login. php: 75
[0x00000000023b4a80] ++ dump failed

[17-Dec-2015 17:31:51] [pool www] pid 19806
Script_filename =/var/tt/mm_reg.php
[0x00000000023707d0] curl_exec ()/var/tt/my. php: 20
[0x000000000236e0f0] http_request_json ()/var/tt/mm_reg.php: 235
[Root @ iZ286xgh6itZ log] # ++ dump failed