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fix: deadlock of mnode if its state changed

This commit is contained in:
Shengliang Guan 2022-08-12 16:32:03 +08:00
parent c47e387d13
commit 1d9331e257
2 changed files with 19 additions and 1 deletions
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3
source/dnode/mnode/impl/inc/mndInt.h
View File

@ -87,10 +87,11 @@ typedef struct {
typedef struct {
tsem_t syncSem;
int64_t sync;
bool standby;
SReplica replica;
int32_t errCode;
int32_t transId;
SRWLatch lock;
int8_t standby;
int8_t leaderTransferFinish;
} SSyncMgmt;

17
source/dnode/mnode/impl/src/mndSync.c
View File

@ -60,15 +60,19 @@ void mndSyncCommitMsg(struct SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbM
sdbSetApplyInfo(pMnode->pSdb, cbMeta.index, cbMeta.term, cbMeta.lastConfigIndex);
}
taosRLockLatch(&pMgmt->lock);
if (transId <= 0) {
taosRUnLockLatch(&pMgmt->lock);
mError("trans:%d, invalid commit msg", transId);
} else if (transId == pMgmt->transId) {
taosRUnLockLatch(&pMgmt->lock);
if (pMgmt->errCode != 0) {
mError("trans:%d, failed to propose since %s", transId, tstrerror(pMgmt->errCode));
}
pMgmt->transId = 0;
tsem_post(&pMgmt->syncSem);
} else {
taosRUnLockLatch(&pMgmt->lock);
STrans *pTrans = mndAcquireTrans(pMnode, transId);
if (pTrans != NULL) {
mDebug("trans:%d, execute in mnode which not leader", transId);
@ -115,6 +119,7 @@ void mndReConfig(struct SSyncFSM *pFsm, const SRpcMsg *pMsg, SReConfigCbMeta cbM
mInfo("trans:-1, sync reconfig is proposed, saved:%d code:0x%x, index:%" PRId64 " term:%" PRId64, pMgmt->transId,
cbMeta.code, cbMeta.index, cbMeta.term);
taosWLockLatch(&pMgmt->lock);
if (pMgmt->transId == -1) {
if (pMgmt->errCode != 0) {
mError("trans:-1, failed to propose sync reconfig since %s", tstrerror(pMgmt->errCode));
@ -122,6 +127,7 @@ void mndReConfig(struct SSyncFSM *pFsm, const SRpcMsg *pMsg, SReConfigCbMeta cbM
pMgmt->transId = 0;
tsem_post(&pMgmt->syncSem);
}
taosWUnLockLatch(&pMgmt->lock);
}
int32_t mndSnapshotStartRead(struct SSyncFSM *pFsm, void *pParam, void **ppReader) {
@ -170,20 +176,24 @@ static void mndBecomeFollower(struct SSyncFSM *pFsm) {
SMnode *pMnode = pFsm->data;
mDebug("vgId:1, become follower");
taosWLockLatch(&pMnode->syncMgmt.lock);
if (pMnode->syncMgmt.transId != 0) {
pMnode->syncMgmt.transId = 0;
tsem_post(&pMnode->syncMgmt.syncSem);
}
taosWUnLockLatch(&pMnode->syncMgmt.lock);
}
static void mndBecomeLeader(struct SSyncFSM *pFsm) {
mDebug("vgId:1, become leader");
SMnode *pMnode = pFsm->data;
taosWLockLatch(&pMnode->syncMgmt.lock);
if (pMnode->syncMgmt.transId != 0) {
pMnode->syncMgmt.transId = 0;
tsem_post(&pMnode->syncMgmt.syncSem);
}
taosWUnLockLatch(&pMnode->syncMgmt.lock);
}
SSyncFSM *mndSyncMakeFsm(SMnode *pMnode) {
@ -210,6 +220,8 @@ SSyncFSM *mndSyncMakeFsm(SMnode *pMnode) {
int32_t mndInitSync(SMnode *pMnode) {
SSyncMgmt *pMgmt = &pMnode->syncMgmt;
taosInitRWLatch(&pMgmt->lock);
pMgmt->transId = 0;
SSyncInfo syncInfo = {.vgId = 1, .FpSendMsg = mndSyncSendMsg, .FpEqMsg = mndSyncEqMsg};
snprintf(syncInfo.path, sizeof(syncInfo.path), "%s%ssync", pMnode->path, TD_DIRSEP);
@ -262,11 +274,14 @@ int32_t mndSyncPropose(SMnode *pMnode, SSdbRaw *pRaw, int32_t transId) {
memcpy(req.pCont, pRaw, req.contLen);
pMgmt->errCode = 0;
taosWLockLatch(&pMgmt->lock);
pMgmt->transId = transId;
taosWUnLockLatch(&pMgmt->lock);
mTrace("trans:%d, will be proposed", pMgmt->transId);
const bool isWeak = false;
int32_t code = syncPropose(pMgmt->sync, &req, isWeak);
if (code == 0) {
tsem_wait(&pMgmt->syncSem);
} else if (code == -1 && terrno == TSDB_CODE_SYN_NOT_LEADER) {
@ -294,10 +309,12 @@ void mndSyncStart(SMnode *pMnode) {
}
void mndSyncStop(SMnode *pMnode) {
taosWLockLatch(&pMnode->syncMgmt.lock);
if (pMnode->syncMgmt.transId != 0) {
pMnode->syncMgmt.transId = 0;
tsem_post(&pMnode->syncMgmt.syncSem);
}
taosWUnLockLatch(&pMnode->syncMgmt.lock);
}
bool mndIsMaster(SMnode *pMnode) {