HADOOP-6056. Use java.net.preferIPv4Stack to force IPv4. Contributed by Michele Catasta.
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1062543 13f79535-47bb-0310-9956-ffa450edef68
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@ -263,6 +263,9 @@ Release 0.22.0 - Unreleased
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HADOOP-7104. Remove unnecessary DNS reverse lookups from RPC layer
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(Kan Zhang via todd)
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HADOOP-6056. Use java.net.preferIPv4Stack to force IPv4.
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(Michele Catasta via shv)
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OPTIMIZATIONS
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HADOOP-6884. Add LOG.isDebugEnabled() guard for each LOG.debug(..).
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@ -69,6 +69,15 @@ if [ -f "${HADOOP_CONF_DIR}/hadoop-env.sh" ]; then
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. "${HADOOP_CONF_DIR}/hadoop-env.sh"
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fi
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# check if net.ipv6.bindv6only is set to 1
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bindv6only=$(/sbin/sysctl -n net.ipv6.bindv6only 2> /dev/null)
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if [ -n "$bindv6only" ] && [ "$bindv6only" -eq "1" ] && [ "$HADOOP_ALLOW_IPV6" != "yes" ]
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then
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echo "Error: \"net.ipv6.bindv6only\" is set to 1 - Java networking could be broken"
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echo "For more info: http://wiki.apache.org/hadoop/HadoopIPv6"
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exit 1
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fi
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# some Java parameters
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if [ "$JAVA_HOME" != "" ]; then
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#echo "run java in $JAVA_HOME"
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@ -211,6 +220,9 @@ if [ "x$JAVA_LIBRARY_PATH" != "x" ]; then
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fi
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HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.policy.file=$HADOOP_POLICYFILE"
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# Disable ipv6 as it can cause issues
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HADOOP_OPTS="$HADOOP_OPTS -Djava.net.preferIPv4Stack=true"
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# put hdfs in classpath if present
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if [ "$HADOOP_HDFS_HOME" = "" ]; then
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if [ -d "${HADOOP_HOME}/hdfs" ]; then
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@ -52,3 +52,6 @@ export HADOOP_JOBTRACKER_OPTS="-Dcom.sun.management.jmxremote $HADOOP_JOBTRACKER
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# The scheduling priority for daemon processes. See 'man nice'.
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# export HADOOP_NICENESS=10
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# Allow Hadoop to run with sysctl net.ipv6.bindv6only = 1
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# export HADOOP_ALLOW_IPV6=yes
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