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Add some comment to PR #6144 changes.

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antirez 2019-12-17 09:19:47 +01:00
parent f3d67b3842
commit 4348d25fc4
1 changed files with 12 additions and 4 deletions
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16
src/cluster.c
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@ -5599,14 +5599,22 @@ clusterNode *getNodeByQuery(client *c, struct redisCommand *cmd, robj **argv, in
* if it is a read command and when allow_reads_when_down is enabled. */
if (server.cluster->state != CLUSTER_OK) {
if (!server.cluster_allow_reads_when_down) {
/* The cluster is configured to block commands when the
* cluster is down. */
if (error_code) *error_code = CLUSTER_REDIR_DOWN_STATE;
return NULL;
}
if (!(cmd->flags & CMD_READONLY) && !(cmd->proc == evalCommand)
&& !(cmd->proc == evalShaCommand)) {
} else if (!(cmd->flags & CMD_READONLY) && !(cmd->proc == evalCommand)
&& !(cmd->proc == evalShaCommand))
{
/* The cluster is configured to allow read only commands
* but this command is neither readonly, nor EVAL or
* EVALSHA. */
if (error_code) *error_code = CLUSTER_REDIR_DOWN_RO_STATE;
return NULL;
} else {
/* Fall through and allow the command to be executed:
* this happens when server.cluster_allow_reads_when_down is
* true and the command is a readonly command or EVAL / EVALSHA. */
}
}