net.schmizz.sshj
SFTP ライブラリを使用する夜間の仕事があります。
SFTP先のサーバーに変更があったと思われます。ただし、正確な変更が何であるかを特定することはできません。また、本番サーバー以外で再現することもできません。だから私は根本的な原因の洞察、または次のエラーを再現する方法を探しています
net.schmizz.sshj.transport.TransportException: Timeout expired
at net.schmizz.sshj.transport.TransportException$1.chain(TransportException.java:33)
at net.schmizz.sshj.transport.TransportException$1.chain(TransportException.java:27)
at net.schmizz.concurrent.Promise.retrieve(Promise.java:139)
at net.schmizz.concurrent.Event.await(Event.java:103)
at net.schmizz.sshj.transport.KeyExchanger.waitForDone(KeyExchanger.java:160)
at net.schmizz.sshj.transport.KeyExchanger.startKex(KeyExchanger.java:155)
at net.schmizz.sshj.transport.TransportImpl.doKex(TransportImpl.java:247)
at net.schmizz.sshj.SSHClient.doKex(SSHClient.java:735)
at net.schmizz.sshj.SSHClient.onConnect(SSHClient.java:723)
at net.schmizz.sshj.SocketClient.connect(SocketClient.java:54)
at net.schmizz.sshj.SocketClient.connect(SocketClient.java:80)
私が知る限り、java.net.Socket
ok 経由で接続し、このコードでキー交換が完了するのを待ってタイムアウトします
package net.schmizz.sshj.transport;
/** Algorithm negotiation and key exchange. */
final class KeyExchanger
implements SSHPacketHandler, ErrorNotifiable {
/**
* Starts key exchange by sending a {@code SSH_MSG_KEXINIT} packet. Key exchange needs to be done once mandatorily
* after initializing the {@link Transport} for it to be usable and may be initiated at any later point e.g. if
* {@link Transport#getConfig() algorithms} have changed and should be renegotiated.
*
* @param waitForDone whether should block till key exchange completed
*
* @throws TransportException if there is an error during key exchange
* @see {@link Transport#setTimeoutMs} for setting timeout for kex
*/
void startKex(boolean waitForDone)
throws TransportException {
if (!kexOngoing.getAndSet(true)) {
done.clear();
sendKexInit();
}
if (waitForDone)
waitForDone();
}
/**
* Sends SSH_MSG_KEXINIT and sets the {@link #kexInitSent} event.
*
* @throws TransportException
*/
private void sendKexInit()
throws TransportException {
log.debug("Sending SSH_MSG_KEXINIT");
clientProposal = new Proposal(transport.getConfig());
transport.write(clientProposal.getPacket());
kexInitSent.set();
}
void waitForDone()
throws TransportException {
done.await(transport.getTimeoutMs(), TimeUnit.MILLISECONDS);
}