diff options
author | 2017-06-26 11:06:00 -0700 | |
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committer | 2017-06-26 11:06:00 -0700 | |
commit | 9d1a5de94e438c89dc0e359ce0038fc138cdaf9f (patch) | |
tree | f1efb8e15e5d1d09ea5fd7d050822e2bd402bf2a | |
parent | 1f0fc53e9719755302d5f160959728b4c30077c3 (diff) |
Fix RR policy connectivity state upon subchannels shutdown
-rw-r--r-- | src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.c | 41 |
1 files changed, 26 insertions, 15 deletions
diff --git a/src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.c b/src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.c index e7d38f751d..c41f22ea9a 100644 --- a/src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.c +++ b/src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.c @@ -126,6 +126,8 @@ struct rr_subchannel_list { size_t num_ready; /** how many subchannels are in state TRANSIENT_FAILURE */ size_t num_transient_failures; + /** how many subchannels are in state SHUTDOWN */ + size_t num_shutdown; /** how many subchannels are in state IDLE */ size_t num_idle; @@ -425,14 +427,20 @@ static void update_state_counters_locked(subchannel_data *sd) { } else if (sd->prev_connectivity_state == GRPC_CHANNEL_TRANSIENT_FAILURE) { GPR_ASSERT(subchannel_list->num_transient_failures > 0); --subchannel_list->num_transient_failures; + } else if (sd->prev_connectivity_state == GRPC_CHANNEL_SHUTDOWN) { + GPR_ASSERT(subchannel_list->num_shutdown > 0); + --subchannel_list->num_shutdown; } else if (sd->prev_connectivity_state == GRPC_CHANNEL_IDLE) { GPR_ASSERT(subchannel_list->num_idle > 0); --subchannel_list->num_idle; } + if (sd->curr_connectivity_state == GRPC_CHANNEL_READY) { ++subchannel_list->num_ready; } else if (sd->curr_connectivity_state == GRPC_CHANNEL_TRANSIENT_FAILURE) { ++subchannel_list->num_transient_failures; + } else if (sd->curr_connectivity_state == GRPC_CHANNEL_SHUTDOWN) { + ++subchannel_list->num_shutdown; } else if (sd->curr_connectivity_state == GRPC_CHANNEL_IDLE) { ++subchannel_list->num_idle; } @@ -455,7 +463,8 @@ static grpc_connectivity_state update_lb_connectivity_status_locked( * CHECK: sd->curr_connectivity_state == CONNECTING. * * 3) RULE: ALL subchannels are SHUTDOWN => policy is SHUTDOWN. - * CHECK: p->subchannel_list->num_subchannels = 0. + * CHECK: p->subchannel_list->num_shutdown == + * p->subchannel_list->num_subchannels. * * 4) RULE: ALL subchannels are TRANSIENT_FAILURE => policy is * TRANSIENT_FAILURE. @@ -464,37 +473,38 @@ static grpc_connectivity_state update_lb_connectivity_status_locked( * 5) RULE: ALL subchannels are IDLE => policy is IDLE. * CHECK: p->num_idle == p->subchannel_list->num_subchannels. */ + grpc_connectivity_state new_state = sd->curr_connectivity_state; rr_subchannel_list *subchannel_list = sd->subchannel_list; round_robin_lb_policy *p = subchannel_list->policy; if (subchannel_list->num_ready > 0) { /* 1) READY */ grpc_connectivity_state_set(exec_ctx, &p->state_tracker, GRPC_CHANNEL_READY, GRPC_ERROR_NONE, "rr_ready"); - return GRPC_CHANNEL_READY; + new_state = GRPC_CHANNEL_READY; } else if (sd->curr_connectivity_state == GRPC_CHANNEL_CONNECTING) { /* 2) CONNECTING */ grpc_connectivity_state_set(exec_ctx, &p->state_tracker, GRPC_CHANNEL_CONNECTING, GRPC_ERROR_NONE, "rr_connecting"); - return GRPC_CHANNEL_CONNECTING; - } else if (p->subchannel_list->num_subchannels == 0) { /* 3) SHUTDOWN */ + new_state = GRPC_CHANNEL_CONNECTING; + } else if (p->subchannel_list->num_shutdown == + p->subchannel_list->num_subchannels) { /* 3) SHUTDOWN */ grpc_connectivity_state_set(exec_ctx, &p->state_tracker, - GRPC_CHANNEL_SHUTDOWN, GRPC_ERROR_REF(error), - "rr_shutdown"); - return GRPC_CHANNEL_SHUTDOWN; + GRPC_CHANNEL_SHUTDOWN, GRPC_ERROR_REF(error), "rr_shutdown"); + new_state = GRPC_CHANNEL_SHUTDOWN; } else if (subchannel_list->num_transient_failures == p->subchannel_list->num_subchannels) { /* 4) TRANSIENT_FAILURE */ grpc_connectivity_state_set(exec_ctx, &p->state_tracker, - GRPC_CHANNEL_TRANSIENT_FAILURE, - GRPC_ERROR_REF(error), "rr_transient_failure"); - return GRPC_CHANNEL_TRANSIENT_FAILURE; + GRPC_CHANNEL_TRANSIENT_FAILURE, GRPC_ERROR_REF(error), + "rr_transient_failure"); + new_state = GRPC_CHANNEL_TRANSIENT_FAILURE; } else if (subchannel_list->num_idle == p->subchannel_list->num_subchannels) { /* 5) IDLE */ grpc_connectivity_state_set(exec_ctx, &p->state_tracker, GRPC_CHANNEL_IDLE, GRPC_ERROR_NONE, "rr_idle"); - return GRPC_CHANNEL_IDLE; + new_state = GRPC_CHANNEL_IDLE; } - /* no change */ - return sd->curr_connectivity_state; + GRPC_ERROR_UNREF(error); + return new_state; } static void rr_connectivity_changed_locked(grpc_exec_ctx *exec_ctx, void *arg, @@ -657,8 +667,9 @@ static void rr_ping_one_locked(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol, grpc_connected_subchannel_ping(exec_ctx, target, closure); GRPC_CONNECTED_SUBCHANNEL_UNREF(exec_ctx, target, "rr_picked"); } else { - GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_CREATE_FROM_STATIC_STRING( - "Round Robin not connected")); + GRPC_CLOSURE_SCHED( + exec_ctx, closure, + GRPC_ERROR_CREATE_FROM_STATIC_STRING("Round Robin not connected")); } } |