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Attempting to load ha_spider.so as an option to mariadb-install-db will cause the same to hang (remove the data dir before starting mariadb-install-db):
$ /test/MD291122-mariadb-10.11.2-linux-x86_64-dbg/scripts/mariadb-install-db --no-defaults --force --auth-root-authentication-method=normal --plugin-load-add=ha_spider.so --basedir=/test/MD291122-mariadb-10.11.2-linux-x86_64-dbg --datadir=/test/MD291122-mariadb-10.11.2-linux-x86_64-dbg/data
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Leads to:
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10.11.2 936436ef437c73911c18854a8ce8dad1216331b8 (Debug)
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Installing MariaDB/MySQL system tables in '/test/MD291122-mariadb-10.11.2-linux-x86_64-dbg/data' ...
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strace shows some wait happening/getting stuck (this is the tail of the strace log):
...
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--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3193720, si_uid=1344170783, si_status=0, si_utime=0, si_stime=0} ---
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rt_sigreturn({mask=[]}) = 0
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close(3) = 0
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wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 3193720
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stat("/test/MD291122-mariadb-10.11.2-linux-x86_64-dbg/data", 0x7ffc5fba7a30) = -1 ENOENT (No such file or directory)
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pipe([3, 4]) = 0
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clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x14d6912a1850) = 3193721
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close(4) = 0
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read(3, "", 128) = 0
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close(3) = 0
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--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3193721, si_uid=1344170783, si_status=0, si_utime=0, si_stime=0} ---
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rt_sigreturn({mask=[]}) = 0
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wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 3193721
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stat("/usr/local/sbin/chmod", 0x7ffc5fba7ba0) = -1 ENOENT (No such file or directory)
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stat("/usr/local/bin/chmod", 0x7ffc5fba7ba0) = -1 ENOENT (No such file or directory)
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stat("/usr/sbin/chmod", 0x7ffc5fba7ba0) = -1 ENOENT (No such file or directory)
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stat("/usr/bin/chmod", 0x7ffc5fba7ba0) = -1 ENOENT (No such file or directory)
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stat("/sbin/chmod", 0x7ffc5fba7ba0) = -1 ENOENT (No such file or directory)
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stat("/bin/chmod", {st_mode=S_IFREG|0755, st_size=63864, ...}) = 0
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clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x14d6912a1850) = 3193722
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wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 3193722
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--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3193722, si_uid=1344170783, si_status=0, si_utime=0, si_stime=0} ---
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rt_sigreturn({mask=[]}) = 3193722
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wait4(-1, 0x7ffc5fba7afc, WNOHANG, NULL) = -1 ECHILD (No child processes)
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read(10, "&& \\\n chmod 04755 \"$pamtooldi"..., 8192) = 6014
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stat("/test/MD291122-mariadb-10.11.2-linux-x86_64-dbg/data/mysql/user.frm", 0x7ffc5fba7ae0) = -1 ENOENT (No such file or directory)
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write(1, "Installing MariaDB/MySQL system "..., 101Installing MariaDB/MySQL system tables in '/test/MD291122-mariadb-10.11.2-linux-x86_64-dbg/data' ...
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) = 101
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pipe([3, 4]) = 0
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clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x14d6912a1850) = 3193723
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close(4) = 0
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pipe([4, 5]) = 0
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clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x14d6912a1850) = 3193725
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close(3) = 0
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close(5) = 0
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clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x14d6912a1850) = 3193727
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close(4) = 0
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close(-1) = -1 EBADF (Bad file descriptor)
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wait4(-1, _ # < end of log, cursor permanently blinks in location of '_'
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CTRL+c will make no difference/not stop the hang, CTRL+z with kill %1 is needed to end/kill the process.
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