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I'm trying to configure hadoop using cygwin.. It is my first time to use unix environment but while configuring hadoop-env.sh i get the this EOF error

# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Set Hadoop-specific environment variables here.

# The only required environment variable is JAVA_HOME.  All others are
# optional.  When running a distributed configuration it is best to
# set JAVA_HOME in this file, so that it is correctly defined on
# remote nodes.

# The java implementation to use.
export JAVA_HOME=${"C:\Java\"}

# The jsvc implementation to use. Jsvc is required to run secure datanodes
# that bind to privileged ports to provide authentication of data transfer
# protocol.  Jsvc is not required if SASL is configured for authentication                 of
# data transfer protocol using non-privileged ports.
#export JSVC_HOME=${JSVC_HOME}

export HADOOP_CONF_DIR=${HADOOP_CONF_DIR:-"/etc/hadoop"}

# Extra Java CLASSPATH elements.  Automatically insert capacity-scheduler.
for f in $HADOOP_HOME/contrib/capacity-scheduler/*.jar; do
  if [ "$HADOOP_CLASSPATH" ]; then
    export HADOOP_CLASSPATH=$HADOOP_CLASSPATH:$f
  else
    export HADOOP_CLASSPATH=$f
  fi
done

# The maximum amount of heap to use, in MB. Default is 1000.
#export HADOOP_HEAPSIZE=
#export HADOOP_NAMENODE_INIT_HEAPSIZE=""

# Extra Java runtime options.  Empty by default.
export HADOOP_OPTS="$HADOOP_OPTS -Djava.net.preferIPv4Stack=true"

# Command specific options appended to HADOOP_OPTS when specified
export HADOOP_NAMENODE_OPTS="-        Dhadoop.security.logger=${HADOOP_SECURITY_LOGGER:-INFO,RFAS} -    Dhdfs.audit.logger=${HDFS_AUDIT_LOGGER:-INFO,NullAppender}     $HADOOP_NAMENODE_OPTS"
export HADOOP_DATANODE_OPTS="-Dhadoop.security.logger=ERROR,RFAS     $HADOOP_DATANODE_OPTS"

export HADOOP_SECONDARYNAMENODE_OPTS="-Dhadoop.security.logger=${HADOOP_SECURITY_LOGGER:-INFO,RFAS} -    Dhdfs.audit.logger=${HDFS_AUDIT_LOGGER:-INFO,NullAppender}     $HADOOP_SECONDARYNAMENODE_OPTS"

export HADOOP_NFS3_OPTS="$HADOOP_NFS3_OPTS"
export HADOOP_PORTMAP_OPTS="-Xmx512m $HADOOP_PORTMAP_OPTS"

# The following applies to multiple commands (fs, dfs, fsck, distcp etc)
export HADOOP_CLIENT_OPTS="-Xmx512m $HADOOP_CLIENT_OPTS"
#HADOOP_JAVA_PLATFORM_OPTS="-XX:-UsePerfData $HADOOP_JAVA_PLATFORM_OPTS"

# On secure datanodes, user to run the datanode as after dropping     privileges.
# This **MUST** be uncommented to enable secure HDFS if using privileged     ports
# to provide authentication of data transfer protocol.  This **MUST NOT** be
# defined if SASL is configured for authentication of data transfer protocol
# using non-privileged ports.
export HADOOP_SECURE_DN_USER=${HADOOP_SECURE_DN_USER}

# Where log files are stored.  $HADOOP_HOME/logs by default.
#export HADOOP_LOG_DIR=${HADOOP_LOG_DIR}/$USER

# Where log files are stored in the secure data environment.
export HADOOP_SECURE_DN_LOG_DIR=${HADOOP_LOG_DIR}/${HADOOP_HDFS_USER}


# The directory where pid files are stored. /tmp by default.
# NOTE: this should be set to a directory that can only be written to by 
#       the user that will run the hadoop daemons.  Otherwise there is the
#       potential for a symlink attack.
export HADOOP_PID_DIR=${HADOOP_PID_DIR}
export HADOOP_SECURE_DN_PID_DIR=${HADOOP_PID_DIR}

# A string representing this instance of hadoop. $USER by default.
export HADOOP_IDENT_STRING=$USER

And here is the error

/home/mahmoud/hadoop-2.7.1/etc/hadoop/hadoop-env.sh: line 62: unexpected EOF     while looking for matching `"'
/home/mahmoud/hadoop-2.7.1/etc/hadoop/hadoop-env.sh: line 87: syntax error: unexpected end of file

Thanks in advance for help

  • Thanks for your reply..... I'm trying to set the Java home... i tried using \\ but it doesn't work any other suggestion please – Ahmed Hamed Mar 26 '16 at 12:56
4

The quoting looks generally okay, but you probably are running into problems with this line:

export JAVA_HOME=${"C:\Java\"}

The first use of " is not escaped, while the second one is. The '\' character acts as an escape in shell scripts, changing the meaning of the following character. The shell cannot tell that you may have meant to supply a trailing backslash, e.g., in a Cygwin or MinGW port. If you did, doubling each of the backslashes is the way to do this.

Something to check: if your runtime will translate forward slashes to back slashes, e.g., to appease an underlying Windows system. If you can, that makes the script easier to work with.

Addressing a comment, in

export JAVA_HOME=${"C:\Java\"}

the ${ and } are not helpful. You can do what is needed with just

export JAVA_HOME="C:\\Java\\"

The '${and '} delimit parameter expansion. You could in principle perform a substitution within the curly braces, e.g., for changing forward slashes to backward slashes:

FORWARD_HOME='C:/Java/'
export JAVA_HOME=${FORWARD_HOME//\//\\}

Further reading:

  • Thanks for you reply.... but could you explain more – Ahmed Hamed Mar 26 '16 at 12:51
  • Are the ${ and } even necessary? – Joe Mar 26 '16 at 13:03
  • no - but OP could use that for substituting slashes versus backslashes (a different question), and dropping those would not fix the actual problem. – Thomas Dickey Mar 26 '16 at 13:06

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