【CentOS】Sqoop連接配接資料庫報錯

安裝好Sqoop後嘗試安裝mysql資料庫，結果報錯：

[hadoop@master ~]$ sqoop list-database --connect jdbc:mysql://127.0.0.1:3306/ --username root -p
Warning: /usr/local/src/sqoop/../hbase does not exist! HBase imports will fail.
Please set $HBASE_HOME to the root of your HBase installation.
Warning: /usr/local/src/sqoop/../hcatalog does not exist! HCatalog jobs will fail.
Please set $HCAT_HOME to the root of your HCatalog installation.
Warning: /usr/local/src/sqoop/../accumulo does not exist! Accumulo imports will fail.
Please set $ACCUMULO_HOME to the root of your Accumulo installation.
No such sqoop tool: list-database. See 'sqoop help'.      

HBase、hcatalog、accumulo三個元件我都沒有安裝，是以要修改sqoop安裝目錄bin檔案夾下的 ​

​configure-sqoop​

​ 檔案，找到如下位置并注釋：

第一部分：
## Moved to be a runtime check in sqoop.
if [ ! -d "${HBASE_HOME}" ]; then
  echo "Warning: $HBASE_HOME does not exist! HBase imports will fail."
  echo 'Please set $HBASE_HOME to the root of your HBase installation.'
fi

## Moved to be a runtime check in sqoop.
if [ ! -d "${HCAT_HOME}" ]; then
  echo "Warning: $HCAT_HOME does not exist! HCatalog jobs will fail."
  echo 'Please set $HCAT_HOME to the root of your HCatalog installation.'
fi

if [ ! -d "${ACCUMULO_HOME}" ]; then
  echo "Warning: $ACCUMULO_HOME does not exist! Accumulo imports will fail."
  echo 'Please set $ACCUMULO_HOME to the root of your Accumulo installation.'
fi
if [ ! -d "${ZOOKEEPER_HOME}" ]; then
  echo "Warning: $ZOOKEEPER_HOME does not exist! Accumulo imports will fail."
  echo 'Please set $ZOOKEEPER_HOME to the root of your Zookeeper installation.'
fi

第二部分：
export HBASE_HOME
export HCAT_HOME
export HIVE_CONF_DIR
export ACCUMULO_HOME
export ZOOKEEPER_HOME