[pve-devel] corosync bug: cluster break after 1 node clean shutdown
Alexandre DERUMIER
aderumier at odiso.com
Fri Sep 25 18:29:37 CEST 2020
here a new hang:
http://odisoweb1.odiso.net/test4/
This time on corosync start.
node1:
-----
start corosync : 17:22:02
node2
-----
/etc/pve locked 17:22:07
Something new: where doing coredump or bt-full on pmxcfs on node1,
this have unlocked /etc/pve on other nodes
/etc/pve unlocked(with coredump or bt-full): 17:57:40
----- Mail original -----
De: "Fabian Grünbichler" <f.gruenbichler at proxmox.com>
À: "Proxmox VE development discussion" <pve-devel at lists.proxmox.com>
Envoyé: Vendredi 25 Septembre 2020 14:51:30
Objet: Re: [pve-devel] corosync bug: cluster break after 1 node clean shutdown
On September 25, 2020 11:46 am, Alexandre DERUMIER wrote:
>>>I will rebuild once more modifying the send code a bit to log a lot more
>>>details when sending state messages, it would be great if you could
>>>repeat with that as we are still unable to reproduce the issue.
>
> ok, no problem, I'm able to easily reproduce it, I'll do new test when you'll
> send the new version.
>
> (and thanks again to debugging this, because It's really beyond my competence)
same procedure as last time, same place, new checksums:
6b5e2defe543a874e0f7a883e40b279c997438dde158566c4c93c11ea531aef924ed2e4eb2506b5064e49ec9bdd4ebe7acd0b9278e9286eac527b0b15a43d8d7 pve-cluster_6.1-8_amd64.deb
d57ddc08824055826ee15c9c255690d9140e43f8d5164949108f0dc483a2d181b2bda76f0e7f47202699a062342c0cf0bba8f2ae0f7c5411af9967ef051050a0 pve-cluster-dbgsym_6.1-8_amd64.deb
I found one (unfortunately unrelated) bug in our error handling, so
there's that at least ;)
diff --git a/data/src/dfsm.c b/data/src/dfsm.c
index 529c7f9..f3397a0 100644
--- a/data/src/dfsm.c
+++ b/data/src/dfsm.c
@@ -162,8 +162,8 @@ static void
dfsm_send_sync_message_abort(dfsm_t *dfsm)
{
g_return_if_fail(dfsm != NULL);
-
g_mutex_lock (&dfsm->sync_mutex);
+ cfs_dom_debug(dfsm->log_domain, "dfsm_send_sync_message_abort - %" PRIu64" / %" PRIu64, dfsm->msgcount_rcvd, dfsm->msgcount);
dfsm->msgcount_rcvd = dfsm->msgcount;
g_cond_broadcast (&dfsm->sync_cond);
g_mutex_unlock (&dfsm->sync_mutex);
@@ -181,6 +181,7 @@ dfsm_record_local_result(
g_mutex_lock (&dfsm->sync_mutex);
dfsm_result_t *rp = (dfsm_result_t *)g_hash_table_lookup(dfsm->results, &msg_count);
+ cfs_dom_debug(dfsm->log_domain, "dfsm_record_local_result - %" PRIu64": %d", msg_count, msg_result);
if (rp) {
rp->result = msg_result;
rp->processed = processed;
@@ -224,6 +225,48 @@ loop:
return result;
}
+static cs_error_t
+dfsm_send_message_full_debug_state(
+ dfsm_t *dfsm,
+ struct iovec *iov,
+ unsigned int len,
+ int retry)
+{
+ g_return_val_if_fail(dfsm != NULL, CS_ERR_INVALID_PARAM);
+ g_return_val_if_fail(!len || iov != NULL, CS_ERR_INVALID_PARAM);
+
+ struct timespec tvreq = { .tv_sec = 0, .tv_nsec = 100000000 };
+ cs_error_t result;
+ int retries = 0;
+ cfs_dom_message(dfsm->log_domain, "send state message debug");
+ cfs_dom_message(dfsm->log_domain, "cpg_handle %" PRIu64, dfsm->cpg_handle);
+ for (int i = 0; i < len; i++)
+ cfs_dom_message(dfsm->log_domain, "iov[%d] len %zd", i, iov[i].iov_len);
+loop:
+ cfs_dom_message(dfsm->log_domain, "send state message loop body");
+
+ result = cpg_mcast_joined(dfsm->cpg_handle, CPG_TYPE_AGREED, iov, len);
+
+ cfs_dom_message(dfsm->log_domain, "send state message result: %d", result);
+ if (retry && result == CS_ERR_TRY_AGAIN) {
+ nanosleep(&tvreq, NULL);
+ ++retries;
+ if ((retries % 10) == 0)
+ cfs_dom_message(dfsm->log_domain, "cpg_send_message retry %d", retries);
+ if (retries < 100)
+ goto loop;
+ }
+
+ if (retries)
+ cfs_dom_message(dfsm->log_domain, "cpg_send_message retried %d times", retries);
+
+ if (result != CS_OK &&
+ (!retry || result != CS_ERR_TRY_AGAIN))
+ cfs_dom_critical(dfsm->log_domain, "cpg_send_message failed: %d", result);
+
+ return result;
+}
+
static cs_error_t
dfsm_send_state_message_full(
dfsm_t *dfsm,
@@ -235,6 +278,8 @@ dfsm_send_state_message_full(
g_return_val_if_fail(DFSM_VALID_STATE_MESSAGE(type), CS_ERR_INVALID_PARAM);
g_return_val_if_fail(!len || iov != NULL, CS_ERR_INVALID_PARAM);
+ cfs_dom_debug(dfsm->log_domain, "dfsm_send_state_message_full: type %d len %d", type, len);
+
dfsm_message_state_header_t header;
header.base.type = type;
header.base.subtype = 0;
@@ -252,7 +297,7 @@ dfsm_send_state_message_full(
for (int i = 0; i < len; i++)
real_iov[i + 1] = iov[i];
- return dfsm_send_message_full(dfsm, real_iov, len + 1, 1);
+ return type == DFSM_MESSAGE_STATE ? dfsm_send_message_full_debug_state(dfsm, real_iov, len + 1, 1) : dfsm_send_message_full(dfsm, real_iov, len + 1, 1);
}
cs_error_t
@@ -317,6 +362,7 @@ dfsm_send_message_sync(
for (int i = 0; i < len; i++)
real_iov[i + 1] = iov[i];
+ cfs_dom_debug(dfsm->log_domain, "dfsm_send_messag_sync: type NORMAL, count %" PRIu64 ", msgtype %d, len %d", msgcount, msgtype, len);
cs_error_t result = dfsm_send_message_full(dfsm, real_iov, len + 1, 1);
g_mutex_unlock (&dfsm->sync_mutex);
@@ -335,10 +381,12 @@ dfsm_send_message_sync(
if (rp) {
g_mutex_lock (&dfsm->sync_mutex);
- while (dfsm->msgcount_rcvd < msgcount)
+ while (dfsm->msgcount_rcvd < msgcount) {
+ cfs_dom_debug(dfsm->log_domain, "dfsm_send_message_sync: waiting for received messages %" PRIu64 " / %" PRIu64, dfsm->msgcount_rcvd, msgcount);
g_cond_wait (&dfsm->sync_cond, &dfsm->sync_mutex);
+ }
+ cfs_dom_debug(dfsm->log_domain, "dfsm_send_message_sync: done waiting for received messages!");
-
g_hash_table_remove(dfsm->results, &rp->msgcount);
g_mutex_unlock (&dfsm->sync_mutex);
@@ -685,9 +733,13 @@ dfsm_cpg_deliver_callback(
return;
}
+ cfs_dom_debug(dfsm->log_domain, "received message's header type is %d", base_header->type);
+
if (base_header->type == DFSM_MESSAGE_NORMAL) {
dfsm_message_normal_header_t *header = (dfsm_message_normal_header_t *)msg;
+ cfs_dom_debug(dfsm->log_domain, "received normal message (type = %d, subtype = %d, %zd bytes)",
+ base_header->type, base_header->subtype, msg_len);
if (msg_len < sizeof(dfsm_message_normal_header_t)) {
cfs_dom_critical(dfsm->log_domain, "received short message (type = %d, subtype = %d, %zd bytes)",
@@ -704,6 +756,8 @@ dfsm_cpg_deliver_callback(
} else {
int msg_res = -1;
+ cfs_dom_debug(dfsm->log_domain, "deliver message %" PRIu64 " (subtype = %d, length = %zd)",
+ header->count, base_header->subtype, msg_len);
int res = dfsm->dfsm_callbacks->dfsm_deliver_fn(
dfsm, dfsm->data, &msg_res, nodeid, pid, base_header->subtype,
base_header->time, (uint8_t *)msg + sizeof(dfsm_message_normal_header_t),
@@ -724,6 +778,8 @@ dfsm_cpg_deliver_callback(
*/
dfsm_message_state_header_t *header = (dfsm_message_state_header_t *)msg;
+ cfs_dom_debug(dfsm->log_domain, "received state message (type = %d, subtype = %d, %zd bytes), mode is %d",
+ base_header->type, base_header->subtype, msg_len, mode);
if (msg_len < sizeof(dfsm_message_state_header_t)) {
cfs_dom_critical(dfsm->log_domain, "received short state message (type = %d, subtype = %d, %zd bytes)",
@@ -744,6 +800,7 @@ dfsm_cpg_deliver_callback(
if (mode == DFSM_MODE_SYNCED) {
if (base_header->type == DFSM_MESSAGE_UPDATE_COMPLETE) {
+ cfs_dom_debug(dfsm->log_domain, "received update complete message");
for (int i = 0; i < dfsm->sync_info->node_count; i++)
dfsm->sync_info->nodes[i].synced = 1;
@@ -754,6 +811,7 @@ dfsm_cpg_deliver_callback(
return;
} else if (base_header->type == DFSM_MESSAGE_VERIFY_REQUEST) {
+ cfs_dom_debug(dfsm->log_domain, "received verify request message");
if (msg_len != sizeof(dfsm->csum_counter)) {
cfs_dom_critical(dfsm->log_domain, "cpg received verify request with wrong length (%zd bytes) form node %d/%d", msg_len, nodeid, pid);
@@ -823,7 +881,6 @@ dfsm_cpg_deliver_callback(
} else if (mode == DFSM_MODE_START_SYNC) {
if (base_header->type == DFSM_MESSAGE_SYNC_START) {
-
if (nodeid != dfsm->lowest_nodeid) {
cfs_dom_critical(dfsm->log_domain, "ignore sync request from wrong member %d/%d",
nodeid, pid);
@@ -861,6 +918,7 @@ dfsm_cpg_deliver_callback(
return;
} else if (base_header->type == DFSM_MESSAGE_STATE) {
+ cfs_dom_debug(dfsm->log_domain, "received state message for %d/%d", nodeid, pid);
dfsm_node_info_t *ni;
@@ -906,6 +964,8 @@ dfsm_cpg_deliver_callback(
goto leave;
}
+ } else {
+ cfs_dom_debug(dfsm->log_domain, "haven't received all states, waiting for more");
}
return;
@@ -914,6 +974,7 @@ dfsm_cpg_deliver_callback(
} else if (mode == DFSM_MODE_UPDATE) {
if (base_header->type == DFSM_MESSAGE_UPDATE) {
+ cfs_dom_debug(dfsm->log_domain, "received update message");
int res = dfsm->dfsm_callbacks->dfsm_process_update_fn(
dfsm, dfsm->data, dfsm->sync_info, nodeid, pid, msg, msg_len);
@@ -925,6 +986,7 @@ dfsm_cpg_deliver_callback(
} else if (base_header->type == DFSM_MESSAGE_UPDATE_COMPLETE) {
+ cfs_dom_debug(dfsm->log_domain, "received update complete message");
int res = dfsm->dfsm_callbacks->dfsm_commit_fn(dfsm, dfsm->data, dfsm->sync_info);
@@ -1104,6 +1166,7 @@ dfsm_cpg_confchg_callback(
size_t joined_list_entries)
{
cs_error_t result;
+ cfs_debug("dfsm_cpg_confchg_callback called");
dfsm_t *dfsm = NULL;
result = cpg_context_get(handle, (gpointer *)&dfsm);
@@ -1190,7 +1253,7 @@ dfsm_cpg_confchg_callback(
dfsm_set_mode(dfsm, DFSM_MODE_START_SYNC);
if (lowest_nodeid == dfsm->nodeid) {
- if (!dfsm_send_state_message_full(dfsm, DFSM_MESSAGE_SYNC_START, NULL, 0)) {
+ if (dfsm_send_state_message_full(dfsm, DFSM_MESSAGE_SYNC_START, NULL, 0) != CS_OK) {
cfs_dom_critical(dfsm->log_domain, "failed to send SYNC_START message");
goto leave;
}
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