JSch线上出现com.jcraft.jsch.JSchException: channel is not opened.问题分析

JSch线上出现com.jcraft.jsch.JSchException: channel is not opened.问题分析

1. 背景

1.系统使用jsch这个框架做文件发送以及远程命令执行的操作,系统一直运行正常,直到某一个环境发现

com.jcraft.jsch.JSchException: channel is not opened.
	at com.jcraft.jsch.Channel.sendChannelOpen(Channel.java:768)
	at com.jcraft.jsch.Channel.connect(Channel.java:151)
	at com.jcraft.jsch.Channel.connect(Channel.java:145)
	at com.SeTest.executeShell(SeTest.java:134)
	at com.SeTest$1.run(SeTest.java:31)
	at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1626)
	at java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1618)
	at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
	at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
	at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
	at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)
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