3

只是尝试运行一个非常简单的字数统计示例，但在提交作业时得到以下空指针：

oozie 作业 -oozie= http://localhost:11000/oozie/ -config job.properties -run

[cloudera@localhost Oozie_Example]$ oozie job -oozie=http://localhost:11000/oozie/ -config job.properties -run
java.lang.RuntimeException: java.lang.NullPointerException
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1242)
    at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:2714)
    at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:477)
    at org.apache.oozie.client.OozieClient$JobSubmit.call(OozieClient.java:586)
    at org.apache.oozie.client.OozieClient$JobSubmit.call(OozieClient.java:561)
    at org.apache.oozie.client.OozieClient$ClientCallable.call(OozieClient.java:479)
    at org.apache.oozie.client.OozieClient.run(OozieClient.java:655)
    at org.apache.oozie.cli.OozieCLI.jobCommand(OozieCLI.java:918)
    at org.apache.oozie.cli.OozieCLI.processCommand(OozieCLI.java:579)
    at org.apache.oozie.cli.OozieCLI.run(OozieCLI.java:552)
    at org.apache.oozie.cli.OozieCLI.main(OozieCLI.java:199)
Caused by: java.lang.NullPointerException
    at java.io.ByteArrayInputStream.<init>(ByteArrayInputStream.java:106)
    at sun.misc.CharacterEncoder.encode(CharacterEncoder.java:188)
    at sun.net.www.protocol.http.NegotiateAuthentication.setHeaders(NegotiateAuthentication.java:156)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1482)
    at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:468)
    ... 8 more
java.lang.NullPointerException

这是我的工作属性文件：

nameNode=hdfs://localhost:8020
jobTracker=localhost:8021
queueName=default


inputDir=${nameNode}/user/dev/oozie/workflow/wordcount/input/ 
outputDir=${nameNode}/user/dev/oozie/workflow/wordcount/output/

oozie.libpath=${nameNode}/user/oozie/workflow/wordcount/lib
oozie.use.system.libpath=true

user.name=dev

oozie.wf.application.path=${nameNode}/user/${user.name}/oozie/workflow/wordcount/

有任何想法吗？它发生得很早，所以我认为它与 Oozie 或 namenode 有关。

4

2 回答 2

2

java.lang.NullPointerException是由于您的 job.properties 文件中的错误。

您是否将工作流 XML 放入 HDFS？此外，您应该指定：

oozie.wf.application.path=${nameNode}/user/${user.name}/oozie/workflow/wordcount/my-workflow.xml
于 2015-03-11T19:34:10.433 回答
2

想补充一下这个问题的答案。

当 oozie 客户端收到 NullPointerException 时，通常意味着该请求导致服务器线程失败。如果您想找出“真实”的原因，您应该查看服务器日志，例如 CDH 的 /var/log/oozie/oozie.log。

在那里你会找到详细的堆栈跟踪。事实证明这非常有帮助。至少在我们的案例中，它准确地说明了发生了什么，例如“hdfs 工作流文件不存在，等等……”

于 2015-06-06T21:57:20.383 回答