Hit "SystemStackError: stack level too deep" when purge

[gengmao]

Here is a stack trace.
SystemStackError: stack level too deep each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:120 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:120 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:118 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:118 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:120 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:118 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:120 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:120 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:118 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:118 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:120 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:118 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:120 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:120 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:118 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:118 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:120 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:118 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:120 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:120 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:118 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:118 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:120 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:118 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:120 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:120 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:118 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:118 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:120 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:118 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:120 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:120 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:118 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:118 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:120 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:118 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:120 each at file:/home/mao/zookeeper-util/usr/share/java/zookeeper-util/jruby-complete-1.7.20.jar!/jruby/java/java_ext/java.util.rb:7 purge_path at /home/mao/zookeeper-util/usr/share/zookeeper-util/bin/zookeeper.rb:107