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Flavio Junqueira updated ZOOKEEPER-2366: ---------------------------------------- Attachment: ZOOKEEPER-2366.patch Attaching a patch for this issue. I'm a bit puzzled by the error handling for the reconfigure method. It sounds like it is swallowing exceptions and let the caller continue normally. In this patch, I have made changes to propagate the exception, and I think this is fine, but I'd appreciate if someone else could have a look. > Reconfiguration of client port causes a socket leak > --------------------------------------------------- > > Key: ZOOKEEPER-2366 > URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2366 > Project: ZooKeeper > Issue Type: Bug > Components: quorum > Affects Versions: 3.5.0 > Reporter: Timothy Ward > Assignee: Timothy Ward > Priority: Blocker > Fix For: 3.5.2 > > Attachments: ZOOKEEPER-2366.patch, ZOOKEEPER-2366.patch, > zookeeper.patch > > > The NIOServerCnxnFactory reconfigure method can leak server sockets, and > hence make ports unusable until the JVM restarts: > The first line of the method takes a reference to the current > ServerSocketChannel and then the next line replaces it. The subsequent > interactions with the server socket can fail (for example if the > reconfiguration tries to bind to an in-use port). If they fail *before* the > call to oldSS.close() then oldSS is *never* closed. This holds that port open > forever, and prevents the user from rolling back to the previous port! > The code from reconfigure is shown below: > ServerSocketChannel oldSS = ss; > try { > this.ss = ServerSocketChannel.open(); > ss.socket().setReuseAddress(true); > LOG.info("binding to port " + addr); > ss.socket().bind(addr); > ss.configureBlocking(false); > acceptThread.setReconfiguring(); > oldSS.close(); > acceptThread.wakeupSelector(); > try { > acceptThread.join(); > } catch (InterruptedException e) { > LOG.error("Error joining old acceptThread when > reconfiguring client port " + e.getMessage()); > } > acceptThread = new AcceptThread(ss, addr, selectorThreads); > acceptThread.start(); > } catch(IOException e) { > LOG.error("Error reconfiguring client port to " + addr + " " + > e.getMessage()); > } -- This message was sent by Atlassian JIRA (v6.3.4#6332)