65 lines
2.0 KiB
Bash
65 lines
2.0 KiB
Bash
#!/usr/bin/env bash
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to You under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ------------------------------------------------------------------
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# This script refreshes all namenodes, it's a simple wrapper
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# for dfsadmin to support multiple namenodes.
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# let's locate libexec...
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if [[ -n "${HADOOP_HOME}" ]]; then
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HADOOP_DEFAULT_LIBEXEC_DIR="${HADOOP_HOME}/libexec"
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else
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this="${BASH_SOURCE-$0}"
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bin=$(cd -P -- "$(dirname -- "${this}")" >/dev/null && pwd -P)
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HADOOP_DEFAULT_LIBEXEC_DIR="${bin}/../libexec"
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fi
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HADOOP_LIBEXEC_DIR="${HADOOP_LIBEXEC_DIR:-$HADOOP_DEFAULT_LIBEXEC_DIR}"
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# shellcheck disable=SC2034
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HADOOP_NEW_CONFIG=true
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if [[ -f "${HADOOP_LIBEXEC_DIR}/hdfs-config.sh" ]]; then
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. "${HADOOP_LIBEXEC_DIR}/hdfs-config.sh"
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else
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echo "ERROR: Cannot execute ${HADOOP_LIBEXEC_DIR}/hdfs-config.sh." 2>&1
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exit 1
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fi
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namenodes=$("${HADOOP_HDFS_HOME}/bin/hdfs" getconf -nnRpcAddresses)
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if [[ "$?" != '0' ]] ; then
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errorFlag='1' ;
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else
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for namenode in ${namenodes} ; do
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echo "Refreshing namenode [${namenode}]"
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"${HADOOP_HDFS_HOME}/bin/hdfs" dfsadmin \
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-fs hdfs://${namenode} -refreshNodes
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if [[ "$?" != '0' ]]; then
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errorFlag='1'
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fi
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done
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fi
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if [[ "${errorFlag}" = '1' ]] ; then
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echo "Error: refresh of namenodes failed, see error messages above."
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exit 1
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else
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echo "Refresh of namenodes done."
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fi
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# eof
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