Question

$NIFI_HOME/logs/nifi-app.log的输出：

2016-10-26 12:45:13,304 ERROR [Timer-Driven Process Thread-6] o.apache.nifi.processors.standard.PutSQL
org.apache.nifi.processor.exception.ProcessException: org.apache.commons.dbcp.SQLNestedException: Cannot create JDBC driver of class 'com.mysql.jdbc.Driver' for connect URL 'jdbc:sqlserver://*BLOCKED*/*BLOCKED*'
        at org.apache.nifi.dbcp.DBCPConnectionPool.getConnection(DBCPConnectionPool.java:234) ~[na:na]
        at sun.reflect.GeneratedMethodAccessor393.invoke(Unknown Source) ~[na:na]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_101]
        at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_101]
        at org.apache.nifi.controller.service.StandardControllerServiceProvider$1.invoke(StandardControllerServiceProvider.java:177) ~[nifi-framework-core-1.0.0.jar:1.0.0]
        at com.sun.proxy.$Proxy81.getConnection(Unknown Source) ~[na:na]
        at org.apache.nifi.processors.standard.PutSQL.onTrigger(PutSQL.java:218) ~[na:na]
        at org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27) ~[nifi-api-1.0.0.jar:1.0.0]
        at org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1064) ~[nifi-framework-core-1.0.0.jar:1.0.0]
        at org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:136) [nifi-framework-core-1.0.0.jar:1.0.0]
        at org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:47) [nifi-framework-core-1.0.0.jar:1.0.0]
        at org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:132) [nifi-framework-core-1.0.0.jar:1.0.0]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_101]
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) [na:1.8.0_101]
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_101]
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) [na:1.8.0_101]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_101]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_101]
        at java.lang.Thread.run(Thread.java:745) [na:1.8.0_101]
Caused by: org.apache.commons.dbcp.SQLNestedException: Cannot create JDBC driver of class 'com.mysql.jdbc.Driver' for connect URL 'jdbc:sqlserver://*BLOCKED*:3306/*BLOCKED*'
        at org.apache.commons.dbcp.BasicDataSource.createConnectionFactory(BasicDataSource.java:1452) ~[na:na]
        at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1371) ~[na:na]
        at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044) ~[na:na]
        at org.apache.nifi.dbcp.DBCPConnectionPool.getConnection(DBCPConnectionPool.java:231) ~[na:na]
        ... 18 common frames omitted
Caused by: java.sql.SQLException: No suitable driver
        at java.sql.DriverManager.getDriver(DriverManager.java:315) ~[na:1.8.0_101]
        at org.apache.commons.dbcp.BasicDataSource.createConnectionFactory(BasicDataSource.java:1437) ~[na:na]

Answer 1

看来这个问题已经在HCC上得到了回答，全线程是here，结论是：

以“ jdbc：hive2”前缀开头

jdbc：hive2：//host.name.net：10000 /; principal=hive/_HOST@EXAMPLE.COM

将以下属性添加到在HiveConnectionPool“ Hive配置资源”属性下传递的hive-site.xml中。

hadoop.security.authentication kerberos

Answer 2

收到异常消息

java.sql.SQLException：没有合适的驱动程序

很明显，您缺少的是驱动程序。 DBCPConnectionPool具有名为Database Driver Location(s)的配置属性。您需要在其中添加MySQL驱动程序（jar）的位置。 This可以做到。

发生的事情是，控制器服务正在运行时加载此jar，并且在将类加载到内存之后，它会寻找com.mysql.jdbc.Driver。这样，您可以提供任何驱动程序jar并连接到任何jdbc支持的数据库。

Apache-Nifi无法创建类'com.mysql.jdbc.Driver'的JDBC驱动程序

2 个答案: