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Modlue fork is killed when the parent exists

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This commit is contained in:
Oran Agra 2019-08-25 10:11:48 +03:00
parent 56258c6b7d
commit 78bbb9b58d
3 changed files with 22 additions and 11 deletions
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26
src/module.c
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@ -5086,20 +5086,11 @@ int RM_ExitFromChild(int retcode)
return REDISMODULE_OK;
}
/* Can be used to kill the forked child process from the parent process.
* child_pid whould be the return value of RedisModule_Fork. */
int RM_KillForkChild(int child_pid)
{
void TerminateModuleForkChild(int wait) {
int statloc;
/* No module child? return. */
if (server.module_child_pid == -1) return REDISMODULE_ERR;
/* Make sure the module knows the pid it wants to kill (not trying to
* randomly kill other module's forks) */
if (server.module_child_pid != child_pid) return REDISMODULE_ERR;
/* Kill module child, wait for child exit. */
serverLog(LL_NOTICE,"Killing running module fork child: %ld",
(long) server.module_child_pid);
if (kill(server.module_child_pid,SIGUSR1) != -1) {
if (kill(server.module_child_pid,SIGUSR1) != -1 && wait) {
while(wait3(&statloc,0,NULL) != server.module_child_pid);
}
/* Reset the buffer accumulating changes while the child saves. */
@ -5108,6 +5099,19 @@ int RM_KillForkChild(int child_pid)
moduleForkInfo.done_handler_user_data = NULL;
closeChildInfoPipe();
updateDictResizePolicy();
}
/* Can be used to kill the forked child process from the parent process.
* child_pid whould be the return value of RedisModule_Fork. */
int RM_KillForkChild(int child_pid)
{
/* No module child? return. */
if (server.module_child_pid == -1) return REDISMODULE_ERR;
/* Make sure the module knows the pid it wants to kill (not trying to
* randomly kill other module's forks) */
if (server.module_child_pid != child_pid) return REDISMODULE_ERR;
/* Kill module child, wait for child exit. */
TerminateModuleForkChild(1);
return REDISMODULE_OK;
}

6
src/server.c
View File

@ -3551,6 +3551,12 @@ int prepareForShutdown(int flags) {
killRDBChild();
}
/* Kill module child if there is one. */
if (server.module_child_pid != -1) {
serverLog(LL_WARNING,"There is a module fork child. Killing it!");
TerminateModuleForkChild(0);
}
if (server.aof_state != AOF_OFF) {
/* Kill the AOF saving child as the AOF we already have may be longer
* but contains the full dataset anyway. */

1
src/server.h
View File

@ -1532,6 +1532,7 @@ void moduleReleaseGIL(void);
void moduleNotifyKeyspaceEvent(int type, const char *event, robj *key, int dbid);
void moduleCallCommandFilters(client *c);
void ModuleForkDoneHandler(int exitcode, int bysignal);
void TerminateModuleForkChild(int wait);
/* Utils */
long long ustime(void);