SFTP Camel Route failing with IndexOutOfBoundsException from jsch library

Issue

• We have a Camel route polling an SFTP endpoint. The route was working fine for several days, then started printing an exception to the logs

Caused by: java.lang.IndexOutOfBoundsException
    at java.io.PipedInputStream.read(PipedInputStream.java:372)[:1.7.0_85]
    at com.jcraft.jsch.ChannelSftp.fill(ChannelSftp.java:2882)[50:org.apache.servicemix.bundles.jsch:0.1.51.1]
    at com.jcraft.jsch.ChannelSftp.fill(ChannelSftp.java:2874)[50:org.apache.servicemix.bundles.jsch:0.1.51.1]
    at com.jcraft.jsch.ChannelSftp._realpath(ChannelSftp.java:2332)[50:org.apache.servicemix.bundles.jsch:0.1.51.1]
    at com.jcraft.jsch.ChannelSftp.cd(ChannelSftp.java:342)[50:org.apache.servicemix.bundles.jsch:0.1.51.1]

• At this point, although the route shows as working in the console, no further files are consumed.
• The container was restarted and the route started consuming files again as expected.