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Check that cluster connection is valid before setting write handler

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Former-commit-id: 6a0a005ff2587c1c2647d3a077472b8bca38a074
This commit is contained in:
VivekSainiEQ 2021-11-02 17:43:17 +00:00
parent 742c45ba37
commit 890de52b5c
1 changed files with 4 additions and 1 deletions
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5
src/cluster.cpp
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@ -2447,7 +2447,10 @@ void clusterSendMessage(clusterLink *link, unsigned char *msg, size_t msglen) {
if (sdslen(link->sndbuf) == 0 && msglen != 0)
{
aePostFunction(g_pserver->rgthreadvar[IDX_EVENT_LOOP_MAIN].el, [link] {
connSetWriteHandlerWithBarrier(link->conn, clusterWriteHandler, 1);
/* The connection could be timed out before this posted function executes (thanks to TCP keepalive).
* So check that the connection is still there before setting the write handler, otherwise you segfault */
if (link->conn != nullptr)
connSetWriteHandlerWithBarrier(link->conn, clusterWriteHandler, 1);
});
}