在hive中执行某些hql时发生AvroRuntimeException

时间:2015-04-15 12:33:11

标签: hadoop twitter hive avro

我正在做Flume(1.5.2)和Hive(0.14.0)的Hadoop(2.6.0)twitter示例。我通过Flume成功从twitter获取数据,并将它们存储到我自己的hdfs中。

但是当我想使用hive来处理这些数据来进行一些分析时(只从表中选择一个字段),“失败的异常java.io.IOException:org.apache.avro.AvroRuntimeException:java。 io.EOFException“异常发生,我发现与此异常相关的一些有用信息。

Actuall我可以成功获取文件的大多数记录(如下面的信息,我成功获取了5100行),但最终会失败。因此,我无法一起处理所有推文文件。

Time taken: 1.512 seconds, Fetched: 5100 row(s)   
Failed with exception java.io.IOException:org.apache.avro.AvroRuntimeException: java.io.EOFException
    15/04/15 19:59:18 [main]: ERROR CliDriver: Failed with exception java.io.IOException:org.apache.avro.AvroRuntimeException: java.io.EOFException
    java.io.IOException: org.apache.avro.AvroRuntimeException: java.io.EOFException
        at org.apache.hadoop.hive.ql.exec.FetchOperator.getNextRow(FetchOperator.java:663)
        at org.apache.hadoop.hive.ql.exec.FetchOperator.pushRow(FetchOperator.java:561)
        at org.apache.hadoop.hive.ql.exec.FetchTask.fetch(FetchTask.java:138)
        at org.apache.hadoop.hive.ql.Driver.getResults(Driver.java:1621)
        at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:267)
        at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:199)
        at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:410)
        at org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:783)
        at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:677)
        at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:616)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
    Caused by: org.apache.avro.AvroRuntimeException: java.io.EOFException
        at org.apache.avro.file.DataFileStream.next(DataFileStream.java:222)
        at org.apache.hadoop.hive.ql.io.avro.AvroGenericRecordReader.next(AvroGenericRecordReader.java:153)
        at org.apache.hadoop.hive.ql.io.avro.AvroGenericRecordReader.next(AvroGenericRecordReader.java:52)
        at org.apache.hadoop.hive.ql.exec.FetchOperator.getNextRow(FetchOperator.java:629)
        ... 15 more
    Caused by: java.io.EOFException
        at org.apache.avro.io.BinaryDecoder.ensureBounds(BinaryDecoder.java:473)
        at org.apache.avro.io.BinaryDecoder.readInt(BinaryDecoder.java:128)
        at org.apache.avro.io.BinaryDecoder.readString(BinaryDecoder.java:259)
        at org.apache.avro.io.ValidatingDecoder.readString(ValidatingDecoder.java:107)
        at org.apache.avro.generic.GenericDatumReader.readString(GenericDatumReader.java:348)
        at org.apache.avro.generic.GenericDatumReader.readString(GenericDatumReader.java:341)
        at org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:154)
        at org.apache.avro.generic.GenericDatumReader.readRecord(GenericDatumReader.java:177)
        at org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:148)
        at org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:139)
        at org.apache.avro.file.DataFileStream.next(DataFileStream.java:233)
        at org.apache.avro.file.DataFileStream.next(DataFileStream.java:220)
        ... 18 more

我使用下面的hql创建表

CREATE TABLE tweets
  ROW FORMAT SERDE
     'org.apache.hadoop.hive.serde2.avro.AvroSerDe'
  STORED AS INPUTFORMAT
     'org.apache.hadoop.hive.ql.io.avro.AvroContainerInputFormat'
  OUTPUTFORMAT
     'org.apache.hadoop.hive.ql.io.avro.AvroContainerOutputFormat'
  TBLPROPERTIES ('avro.schema.url'='file:///home/hduser/hive-0.14.0-bin/tweetsdoc_new.avsc');

然后从hdfs加载tweets文件

LOAD DATA INPATH '/user/flume/tweets/FlumeData.1429098355304' OVERWRITE INTO TABLE tweets;

有人能告诉我可能的原因,或者找到更多异常细节的有效方法吗?

1 个答案:

答案 0 :(得分:0)

我也有这个恼人的问题。

我查看了生成的二进制文件并调试了Avro反序列化。

这个EOFException的原因是Flume在每个事件之后插入新的行字符字节(你可以在每个记录之后注意到0x0A)。

Avro deserializer认为该文件尚未完成,并将该字符解释为要读取的一些块数,但是无法在不触及EOF的情况下读出该块数。