HADOOP-12366. expose calculated paths (aw)

hadoop-common-project/hadoop-common/src/main/bin/hadoop

@@ -33,6 +33,7 @@ function hadoop_usage
   hadoop_add_subcommand "daemonlog" "get/set the log level for each daemon"
   hadoop_add_subcommand "distch" "distributed metadata changer"
   hadoop_add_subcommand "distcp" "copy file or directories recursively"
+  hadoop_add_subcommand "envvars" "display computed Hadoop environment variables"
   hadoop_add_subcommand "fs" "run a generic filesystem user client"
   hadoop_add_subcommand "jar <jar>" "run a jar file. NOTE: please use \"yarn jar\" to launch YARN applications, not this command."
   hadoop_add_subcommand "jnipath" "prints the java.library.path"
@@ -138,6 +139,16 @@ case ${COMMAND} in
     CLASS=org.apache.hadoop.tools.DistCp
     hadoop_add_to_classpath_toolspath
   ;;
+  envvars)
+    echo "JAVA_HOME='${JAVA_HOME}'"
+    echo "HADOOP_COMMON_HOME='${HADOOP_COMMON_HOME}'"
+    echo "HADOOP_COMMON_DIR='${HADOOP_COMMON_DIR}'"
+    echo "HADOOP_COMMON_LIB_JARS_DIR='${HADOOP_COMMON_LIB_JARS_DIR}'"
+    echo "HADOOP_COMMON_LIB_NATIVE_DIR='${HADOOP_COMMON_LIB_NATIVE_DIR}'"
+    echo "HADOOP_CONF_DIR='${HADOOP_CONF_DIR}'"
+    echo "HADOOP_TOOLS_PATH='${HADOOP_TOOLS_PATH}'"
+    exit 0
+  ;;
   fs)
     CLASS=org.apache.hadoop.fs.FsShell
   ;;

hadoop-hdfs-project/hadoop-hdfs/src/main/bin/hdfs

@@ -34,6 +34,7 @@ function hadoop_usage
   hadoop_add_subcommand "debug" "run a Debug Admin to execute HDFS debug commands"
   hadoop_add_subcommand "dfs" "run a filesystem command on the file system"
   hadoop_add_subcommand "dfsadmin" "run a DFS admin client"
+  hadoop_add_subcommand "envvars" "display computed Hadoop environment variables"
   hadoop_add_subcommand "erasurecode" "run a HDFS ErasureCoding CLI"
   hadoop_add_subcommand "fetchdt" "fetch a delegation token from the NameNode"
   hadoop_add_subcommand "fsck" "run a DFS filesystem checking utility"
@@ -134,6 +135,15 @@ case ${COMMAND} in
     hadoop_debug "Appending HADOOP_CLIENT_OPTS onto HADOOP_OPTS"
     HADOOP_OPTS="${HADOOP_OPTS} ${HADOOP_CLIENT_OPTS}"
   ;;
+  envvars)
+    echo "JAVA_HOME='${JAVA_HOME}'"
+    echo "HADOOP_HDFS_HOME='${HADOOP_HDFS_HOME}'"
+    echo "HDFS_DIR='${HDFS_DIR}'"
+    echo "HDFS_LIB_JARS_DIR='${HDFS_LIB_JARS_DIR}'"
+    echo "HADOOP_CONF_DIR='${HADOOP_CONF_DIR}'"
+    echo "HADOOP_TOOLS_PATH='${HADOOP_TOOLS_PATH}'"
+    exit 0
+  ;;
   erasurecode)
     CLASS=org.apache.hadoop.hdfs.tools.erasurecode.ECCli
     hadoop_debug "Appending HADOOP_CLIENT_OPTS onto HADOOP_OPTS"

hadoop-mapreduce-project/bin/mapred

@@ -23,6 +23,7 @@ function hadoop_usage
   hadoop_add_subcommand "archive-logs" "combine aggregated logs into hadoop archives"
   hadoop_add_subcommand "classpath" "prints the class path needed for running mapreduce subcommands"
   hadoop_add_subcommand "distcp" "copy file or directories recursively"
+  hadoop_add_subcommand "envvars" "display computed Hadoop environment variables"
   hadoop_add_subcommand "historyserver" "run job history servers as a standalone daemon"
   hadoop_add_subcommand "hsadmin" "job history server admin interface"
   hadoop_add_subcommand "job" "manipulate MapReduce jobs"
@@ -87,6 +88,15 @@ case ${COMMAND} in
     hadoop_debug "Appending HADOOP_CLIENT_OPTS onto HADOOP_OPTS"
     HADOOP_OPTS="${HADOOP_OPTS} ${HADOOP_CLIENT_OPTS}"
   ;;
+  envvars)
+    echo "JAVA_HOME='${JAVA_HOME}'"
+    echo "HADOOP_MAPRED_HOME='${HADOOP_MAPRED_HOME}'"
+    echo "MAPRED_DIR='${MAPRED_DIR}'"
+    echo "MAPRED_LIB_JARS_DIR='${MAPRED_LIB_JARS_DIR}'"
+    echo "HADOOP_CONF_DIR='${HADOOP_CONF_DIR}'"
+    echo "HADOOP_TOOLS_PATH='${HADOOP_TOOLS_PATH}'"
+    exit 0
+  ;;
   historyserver)
     supportdaemonization="true"
     CLASS=org.apache.hadoop.mapreduce.v2.hs.JobHistoryServer

hadoop-yarn-project/hadoop-yarn/bin/yarn

@@ -32,6 +32,7 @@ function hadoop_usage
   hadoop_add_subcommand "cluster" "prints cluster information"
   hadoop_add_subcommand "container" "prints container(s) report"
   hadoop_add_subcommand "daemonlog" "get/set the log level for each daemon"
+  hadoop_add_subcommand "envvars" "display computed Hadoop environment variables"
   hadoop_add_subcommand "jar <jar>" "run a jar file"
   hadoop_add_subcommand "logs" "dump container logs"
   hadoop_add_subcommand "node" "prints node report(s)"
@@ -96,6 +97,15 @@ case "${COMMAND}" in
     hadoop_debug "Append YARN_CLIENT_OPTS onto HADOOP_OPTS"
     HADOOP_OPTS="${HADOOP_OPTS} ${YARN_CLIENT_OPTS}"
   ;;
+  envvars)
+    echo "JAVA_HOME='${JAVA_HOME}'"
+    echo "HADOOP_YARN_HOME='${HADOOP_YARN_HOME}'"
+    echo "YARN_DIR='${YARN_DIR}'"
+    echo "YARN_LIB_JARS_DIR='${YARN_LIB_JARS_DIR}'"
+    echo "HADOOP_CONF_DIR='${HADOOP_CONF_DIR}'"
+    echo "HADOOP_TOOLS_PATH='${HADOOP_TOOLS_PATH}'"
+    exit 0
+  ;;
   jar)
     CLASS=org.apache.hadoop.util.RunJar
     hadoop_debug "Append YARN_CLIENT_OPTS onto HADOOP_OPTS"