hadoop/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/resources/META-INF/services
..
org.apache.hadoop.mapreduce.protocol.ClientProtocolProvider
org.apache.hadoop.security.SecurityInfo
org.apache.hadoop.security.token.TokenIdentifier
org.apache.hadoop.security.token.TokenRenewer