caiconghui commented on a change in pull request #7936:
URL: https://github.com/apache/incubator-doris/pull/7936#discussion_r800158119
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File path: fe/fe-core/src/main/java/org/apache/doris/qe/ConnectScheduler.java
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@@ -96,50 +94,50 @@ public boolean submit(ConnectContext context) {
}
// Register one connection with its connection id.
- public synchronized boolean registerConnection(ConnectContext ctx) {
- if (numberConnection >= maxConnections) {
+ public boolean registerConnection(ConnectContext ctx) {
+ if (numberConnection.incrementAndGet() > maxConnections) {
+ numberConnection.decrementAndGet();
return false;
}
// Check user
- if (connByUser.get(ctx.getQualifiedUser()) == null) {
- connByUser.put(ctx.getQualifiedUser(), new AtomicInteger(0));
- }
- int conns = connByUser.get(ctx.getQualifiedUser()).get();
+ connByUser.putIfAbsent(ctx.getQualifiedUser(), new AtomicInteger(0));
+ AtomicInteger conns = connByUser.get(ctx.getQualifiedUser());
if (ctx.getIsTempUser()) {
- if (conns >= LdapAuthenticate.getMaxConn()) {
+ if (conns.incrementAndGet() > LdapAuthenticate.getMaxConn()) {
+ conns.decrementAndGet();
+ numberConnection.decrementAndGet();
return false;
}
- } else if (conns >=
ctx.getCatalog().getAuth().getMaxConn(ctx.getQualifiedUser())) {
+ } else if (conns.incrementAndGet() >
ctx.getCatalog().getAuth().getMaxConn(ctx.getQualifiedUser())) {
+ conns.decrementAndGet();
+ numberConnection.decrementAndGet();
Review comment:
> why call `numberConnection.decrementAndGet();` here?
we should reduce the connection number when connect failed
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