Dear KNIME team,
I noticed that when shutting down a KNIME server instance on Windows using shutdown.bat, the following lines appear in the catalina log file:
[Thu Oct 06 10:47:39 CEST 2016] SEVERE org.apache.catalina.loader.WebappClassLoader clearReferencesThreads : The web application [/knime] appears to have started a thread named [MVStore background writer nio:C:/knime_server/apache-tomee-plus-1.7.1/conf/userconf.mv.db] but has failed to stop it. This is very likely to create a memory leak. [Thu Oct 06 10:47:39 CEST 2016] SEVERE org.apache.catalina.loader.WebappClassLoader clearReferencesThreads : The web application [/knime] appears to have started a thread named [Thread-78] but has failed to stop it. This is very likely to create a memory leak. [Thu Oct 06 10:47:39 CEST 2016] SEVERE org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks : The web application [/knime] created a ThreadLocal with key of type [org.apache.xmlbeans.impl.schema.SchemaTypeLoaderImpl$1] (value [org.apache.xmlbeans.impl.schema.SchemaTypeLoaderImpl$1@42e00e22]) and a value of type [java.util.ArrayList] (value [[java.lang.ref.SoftReference@5bfac479]]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak. [Thu Oct 06 10:47:39 CEST 2016] SEVERE org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks : The web application [/knime] created a ThreadLocal with key of type [org.apache.xmlbeans.XmlBeans$1] (value [org.apache.xmlbeans.XmlBeans$1@19052abc]) and a value of type [java.lang.ref.SoftReference] (value [java.lang.ref.SoftReference@725c3f9a]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
Do I have to worry about the potential memory leaks?
Thx,
Jan