以下程序將連接到Oracle 11g並獲取記錄。如何在pipeline.apply()中給我編碼器的NullPointerException。JDBC從Oracle獲取Beam
我已將ojdbc14.jar添加到項目依賴項中。
public static void main(String[] args) {
Pipeline p = Pipeline.create(PipelineOptionsFactory.create());
p.apply(JdbcIO.<KV<Integer, String>>read()
.withDataSourceConfiguration(JdbcIO.DataSourceConfiguration.create(
"oracle.jdbc.driver.OracleDriver", "jdbc:oracle:thin:@hostdnsname:port/servicename")
.withUsername("uname")
.withPassword("pwd"))
.withQuery("select EMPID,NAME from EMPLOYEE1")
.withRowMapper(new JdbcIO.RowMapper<KV<Integer, String>>() {
public KV<Integer, String> mapRow(ResultSet resultSet) throws Exception {
return KV.of(resultSet.getInt(1), resultSet.getString(2));
}
}));
p.run();
}
給出下面的錯誤。任何線索?
Exception in thread "main" java.lang.NullPointerException: coder
at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:228)
at org.apache.beam.sdk.io.jdbc.JdbcIO$Read.validate(JdbcIO.java:283)
at org.apache.beam.sdk.io.jdbc.JdbcIO$Read.validate(JdbcIO.java:216)
at org.apache.beam.sdk.Pipeline.applyInternal(Pipeline.java:399)
at org.apache.beam.sdk.Pipeline.applyTransform(Pipeline.java:307)
at org.apache.beam.sdk.values.PBegin.apply(PBegin.java:47)
at org.apache.beam.sdk.Pipeline.apply(Pipeline.java:158)
at org.apache.beam.examples.v030.JdbcUtil.main(JdbcUtil.java:21)
我上面編輯了你的帖子,做了以上更改。它給出了以下錯誤。線程「main」中的異常org.apache.beam.runners.direct.repackaged.com.google.common.util.concurrent.UncheckedExecutionException:org.apache.beam.sdk.util.UserCodeException:java.lang.AbstractMethodError:oracle。 jdbc.driver.T4CConnection.isValid(I)Z – naga
有什麼我失蹤? – naga
@ Kenn,要解決問題,請告訴我您是否需要任何其他信息。 – naga