[sr-dev] [kamailio/kamailio] sqlops cause infinite loop if database server is unreachable (#1690)

### Description The sqlops module run into an infinite loop and print continously this line to the stderr (or stdout): 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] ### Troubleshooting #### Reproduction Set log_stderror=yes Load the sqlops module and configure it with a bad DB host. Example: ``` log_stderror=yes loadmodule "sqlops.so" modparam("sqlops","sqlcon","main=>postgres://abc:abc@INVALID_HOST/test") ``` #### Debugging Data #### Log Messages ``` 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] 22(17903) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(10, 0x2ab72bb7b690, 0, 5000): Invalid argument [22] ... ``` #### SIP Traffic <!-- If the issue is exposed by processing specific SIP messages, grab them with ngrep or save in a pcap file, then add them next, or attach to issue, or provide a link to download them (e.g., to a pastebin site). --> ``` (paste your sip traffic here) ``` ### Possible Solutions <!-- If you found a solution or workaround for the issue, describe it. Ideally, provide a pull request with a fix. --> ### Additional Information * **Kamailio Version** - output of `kamailio -v` ``` 5.1.6 ``` * **Operating System**: <!-- Details about the operating system, the type: Linux (e.g.,: Debian 8.4, Ubuntu 16.04, CentOS 7.1, ...), MacOS, xBSD, Solaris, ...; Kernel details (output of `uname -a`) --> ``` Centos 7 Kernel: 3.10.0-514.26.1.el7.x86_64 ``` -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/1690