Question

我已使用 first方法从以下link安装了 PredictionIo 引擎。现在，我想使用 MYSQL 作为数据源运行引擎。

因此，我已如下所述配置 env.sh 文件：

#!/usr/bin/env bash
#
# Copy this file as pio-env.sh and edit it for your site's configuration.
#
# 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.
#

# PredictionIO Main Configuration
#
# This section controls core behavior of PredictionIO. It is very likely that
# you need to change these to fit your site.

# SPARK_HOME: Apache Spark is a hard dependency and must be configured.
# SPARK_HOME=$PIO_HOME/vendors/spark-2.0.2-bin-hadoop2.7
SPARK_HOME=$PIO_HOME/vendors/spark-2.1.1-bin-hadoop2.6

POSTGRES_JDBC_DRIVER=$PIO_HOME/lib/postgresql-42.0.0.jar
MYSQL_JDBC_DRIVER=$PIO_HOME/lib/mysql-connector-java-8.0.11.jar


# PredictionIO Storage Configuration
#
# This section controls programs that make use of PredictionIO's built-in
# storage facilities. Default values are shown below.
#
# For more information on storage configuration please refer to
# http://predictionio.apache.org/system/anotherdatastore/

# Storage Repositories

# Default is to use PostgreSQL
PIO_STORAGE_REPOSITORIES_METADATA_NAME=pio_meta
PIO_STORAGE_REPOSITORIES_METADATA_SOURCE=MYSQL

PIO_STORAGE_REPOSITORIES_EVENTDATA_NAME=pio_event
PIO_STORAGE_REPOSITORIES_EVENTDATA_SOURCE=MYSQL

PIO_STORAGE_REPOSITORIES_MODELDATA_NAME=pio_model
PIO_STORAGE_REPOSITORIES_MODELDATA_SOURCE=MYSQL

# Storage Data Sources

# PostgreSQL Default Settings
# Please change "pio" to your database name in PIO_STORAGE_SOURCES_PGSQL_URL
# Please change PIO_STORAGE_SOURCES_PGSQL_USERNAME and
# PIO_STORAGE_SOURCES_PGSQL_PASSWORD accordingly
PIO_STORAGE_SOURCES_PGSQL_TYPE=jdbc
PIO_STORAGE_SOURCES_PGSQL_URL=jdbc:postgresql://localhost/pio
PIO_STORAGE_SOURCES_PGSQL_USERNAME=pio
PIO_STORAGE_SOURCES_PGSQL_PASSWORD=pio

# MySQL Example
PIO_STORAGE_SOURCES_MYSQL_TYPE=jdbc
PIO_STORAGE_SOURCES_MYSQL_URL=jdbc:mysql://localhost:3306/pio
PIO_STORAGE_SOURCES_MYSQL_USERNAME=root
PIO_STORAGE_SOURCES_MYSQL_PASSWORD=root

我还将mysql-java-connector jar放在了pio_home / lib目录中。但是，当我运行 pio status 命令时，出现以下错误：

[INFO] [Management$] PredictionIO 0.12.1 is installed at /home/oodles/predictionio/PredictionIO-0.12.1
[INFO] [Management$] Inspecting Apache Spark...
[INFO] [Management$] Apache Spark is installed at /home/oodles/predictionio/PredictionIO-0.12.1/vendors/spark-2.1.1-bin-hadoop2.6
[INFO] [Management$] Apache Spark 2.1.1 detected (meets minimum requirement of 1.3.0)
[INFO] [Management$] Inspecting storage backend connections...
[INFO] [Storage$] Verifying Meta Data Backend (Source: MYSQL)...
[ERROR] [Management$] Unable to connect to all storage backends successfully.
The following shows the error message from the storage backend.

No suitable driver found for jdbc:mysql://localhost:3306/pio (java.sql.SQLException)

Dumping configuration of initialized storage backend sources.
Please make sure they are correct.

Source Name: MYSQL; Type: jdbc; Configuration: PASSWORD -> root, URL -> jdbc:mysql://localhost:3306/pio, TYPE -> jdbc, USERNAME -> root

有人可以帮我吗？

Answer 1

将env.sh文件中的jdbc:mysql://localhost:3306/pio更改为jdbc:mysql://localhost/pio

Answer 2

我也遇到过同样的问题，这是因为未安装JDBC驱动程序，尽管您可能认为它来自pio-env.sh，并说存在某种jar文件。您要做的是转到此网站https://dev.mysql.com/downloads/connector/j/，然后选择“独立于平台”选项，然后单击下载按钮。这个Oracle网站试图让您注册某些东西，但不要这样做。转到页面底部，显示“不，谢谢，只需开始下载”，然后右键单击并保存该链接。现在，您可以使用“ wget”命令获取文件，然后在linux / ubuntu环境中将该文件解压缩。我忘记了解压缩命令文件是什么。我对linux / unix环境不满意，但这确实对PIO有用。

如何使用MYSQL作为数据源运行PredictionIo Engine？

2 个答案: