What causes lots of JBoss Fuse Server IOException DEBUG in logs ?

Issue

• Fuse server log file captures some IOException. Some of them are related to OSGI, some are related to springframework. Grep all IOExcption in attached fuse.log to find detail as mentioned below. The jboss fuse server configuration files in etc folder are almost default. The "activemq.xml" file is renamed to disable AMQ server. We only need Fuse server.

12:18:58,174 | DEBUG | FelixStartLevel  | AbstractWovenProxyAdapter        | 12 - org.apache.aries.proxy.impl - 1.0.1.redhat-610379 | Method entry: visitMethod, args [1025, createFactoryConfiguration, (Ljava/lang/String;)Lorg/osgi/service/cm/Configuration;, null, [java/io/IOException]]
12:18:58,174 | DEBUG | FelixStartLevel  | AbstractWovenProxyAdapter        | 12 - org.apache.aries.proxy.impl - 1.0.1.redhat-610379 | Method entry: visitMethod, args [1025, createFactoryConfiguration, (Ljava/lang/String;Ljava/lang/String;)Lorg/osgi/service/cm/Configuration;, null, [java/io/IOException]]
12:18:58,175 | DEBUG | FelixStartLevel  | AbstractWovenProxyAdapter        | 12 - org.apache.aries.proxy.impl - 1.0.1.redhat-610379 | Method entry: visitMethod, args [1025, getConfiguration, (Ljava/lang/String;Ljava/lang/String;)Lorg/osgi/service/cm/Configuration;, null, [java/io/IOException]]
12:18:58,175 | DEBUG | FelixStartLevel  | AbstractWovenProxyAdapter        | 12 - org.apache.aries.proxy.impl - 1.0.1.redhat-610379 | Method entry: visitMethod, args [1025, getConfiguration, (Ljava/lang/String;)Lorg/osgi/service/cm/Configuration;, null, [java/io/IOException]]
12:18:58,176 | DEBUG | FelixStartLevel  | AbstractWovenProxyAdapter        | 12 - org.apache.aries.proxy.impl - 1.0.1.redhat-610379 | Method entry: visitMethod, args [1025, listConfigurations, (Ljava/lang/String;)[Lorg/osgi/service/cm/Configuration;, null, [java/io/IOException, org/osgi/framework/InvalidSyntaxException]]
12:19:05,430 | DEBUG | FelixStartLevel  | AbstractWovenProxyAdapter        | 12 - org.apache.aries.proxy.impl - 1.0.1.redhat-610379 | Method entry: visitMethod, args [1025, createFactoryConfiguration, (Ljava/lang/String;)Lorg/osgi/service/cm/Configuration;, null, [java/io/IOException]]
12:19:05,431 | DEBUG | FelixStartLevel  | AbstractWovenProxyAdapter        | 12 - org.apache.aries.proxy.impl - 1.0.1.redhat-610379 | Method entry: visitMethod, args [1025, createFactoryConfiguration, (Ljava/lang/String;Ljava/lang/String;)Lorg/osgi/service/cm/Configuration;, null, [java/io/IOException]]
12:19:05,431 | DEBUG | FelixStartLevel  | AbstractWovenProxyAdapter        | 12 - org.apache.aries.proxy.impl - 1.0.1.redhat-610379 | Method entry: visitMethod, args [1025, getConfiguration, (Ljava/lang/String;Ljava/lang/String;)Lorg/osgi/service/cm/Configuration;, null, [java/io/IOException]]
12:19:05,432 | DEBUG | FelixStartLevel  | AbstractWovenProxyAdapter        | 12 - org.apache.aries.proxy.impl - 1.0.1.redhat-610379 | Method entry: visitMethod, args [1025, getConfiguration, (Ljava/lang/String;)Lorg/osgi/service/cm/Configuration;, null, [java/io/IOException]]
12:19:05,432 | DEBUG | FelixStartLevel  | AbstractWovenProxyAdapter        | 12 - org.apache.aries.proxy.impl - 1.0.1.redhat-610379 | Method entry: visitMethod, args [1025, listConfigurations, (Ljava/lang/String;)[Lorg/osgi/service/cm/Configuration;, null, [java/io/IOException, org/osgi/framework/InvalidSyntaxException]]
12:19:05,602 | DEBUG | FelixStartLevel  | AbstractWovenProxyAdapter        | 12 - org.apache.aries.proxy.impl - 1.0.1.redhat-610379 | Method entry: visitMethod, args [1025, createFactoryConfiguration, (Ljava/lang/String;)Lorg/osgi/service/cm/Configuration;, null, [java/io/IOException]]
12:19:05,605 | DEBUG | FelixStartLevel  | AbstractWovenProxyAdapter        | 12 - org.apache.aries.proxy.impl - 1.0.1.redhat-610379 | Method entry: visitMethod, args [1025, createFactoryConfiguration, (Ljava/lang/String;Ljava/lang/String;)Lorg/osgi/service/cm/Configuration;, null, [java/io/IOException]]
12:19:05,605 | DEBUG | FelixStartLevel  | AbstractWovenProxyAdapter        | 12 - org.apache.aries.proxy.impl - 1.0.1.redhat-610379 | Method entry: visitMethod, args [1025, getConfiguration, (Ljava/lang/String;Ljava/lang/String;)Lorg/osgi/service/cm/Configuration;, null, [java/io/IOException]]
12:19:05,607 | DEBUG | FelixStartLevel  | AbstractWovenProxyAdapter        | 12 - org.apache.aries.proxy.impl - 1.0.1.redhat-610379 | Method entry: visitMethod, args [1025, getConfiguration, (Ljava/lang/String;)Lorg/osgi/service/cm/Configuration;, null, [java/io/IOException]]