I found that when Jenkins runs for about two weeks, the memory will be completely occupied (the default upper limit of memory is 1G). Through memory analysis, I found that this object occupies more than 882.42MB. In the CopyOnWriteArrayList property of the internal class ConfigurationData under java.util.logging.Logger, there are a large number of org.jenkinsci.plugins.sshsteps.util.CustomLogHandler objects. This class does not implement the close method, and it is suspected to be related to this.