JSch com.jcraft.jsch.Session sftp连接超时时间timeout默认设置0 导致一直处于等待连接状态

线上排查发现一个定时任务task（原来每隔1小时跑一次的），5.7号只跑了一次，根据日志排查发现，打印了开始的日志，到连接sftp时，下面没有日志了

查看jvm堆栈信息：

jstack -l pid >jstack.log (pid进程id)

jstack -l 63522 >63522-jstack.log

scheduler_Worker-25（日志里看到也是这个线程）

"scheduler_Worker-25" #38 prio=5 os_prio=0 tid=0x00007f0248e4a000 nid=0xf888 runnable [0x00007f0200fcb000]
   java.lang.Thread.State: RUNNABLE
        at java.net.SocketInputStream.socketRead0(Native Method)
        at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
        at java.net.SocketInputStream.read(SocketInputStream.java:171)
        at java.net.SocketInputStream.read(SocketInputStream.java:141)
        at java.net.SocketInputStream.read(SocketInputStream.java:224)
        at com.jcraft.jsch.IO.getByte(IO.java:73)
        at com.jcraft.jsch.Session.connect(Session.java:263)
        at com.jcraft.jsch.Session.connect(Session.java:183)
        at com.cmcc.open.ss.util.CommonSftpUtil.getSftpConnect(CommonSftpUtil.java:85)
        at com.cmcc.open.task.service.PhoneAscriptionQueryTask.downloadAndBak(PhoneAscriptionQueryTask.java:190)
        at com.cmcc.open.task.service.PhoneAscriptionQueryTask.getHoursPhoneNum(PhoneAscriptionQueryTask.java:159)
        at com.cmcc.open.task.service.PhoneAscriptionQueryTask$$FastClassBySpringCGLIB$$fc62f4f8.invoke(<generated>)
        at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
        at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:737)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
        at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:84)
        at com.cmcc.open.task.aop.TaskAspect.taskAspectMethod(TaskAspect.java:67)
        at sun.reflect.GeneratedMethodAccessor155.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:627)
        at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:616)
        at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:168)
        at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
        at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:672)
        at com.cmcc.open.task.service.PhoneAscriptionQueryTask$$EnhancerBySpringCGLIB$$24b5bb1a.getHoursPhoneNum(<generated>)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at com.cmcc.open.task.utils.MyDetailQuartzJobBean.executeInternal(MyDetailQuartzJobBean.java:50)
        at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:75)
        at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
        at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:573)
        - locked <0x00000006d21b37b8> (a java.lang.Object)

   Locked ownable synchronizers:
        - None

最后定位，是没有设置connectTimeout参数，默认是0，导致一直处于等待连接的状态，卡了好几天，导致task都没运行。