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# 对 Amazon EMR on EKS Spark 运算符进行故障排除
<a name="troubleshooting-sparkop"></a>

如果您在使用 Amazon EMR on EKS Spark 运算符时遇到问题，请参阅以下部分。有关更多信息（包括完成安装的步骤），请参阅 [使用 Spark Operator 运行 Spark 任务](spark-operator.md)。

## Helm 图表安装出错
<a name="troubleshooting-sparkop-helmerror"></a>

尝试安装或验证 Helm 图表时，如果您按照 [安装 Spark Operator](spark-operator-gs.md#spark-operator-install) 中的步骤执行操作，返回了如下所示的 `INSTALLATION FAILED` 错误，则说明您可能尚未获取运算符的 Amazon ECR 存储库身份验证令牌。

要解决此问题，请重复 [安装 Spark Operator](spark-operator-gs.md#spark-operator-install) 中的步骤，向 Amazon ECR 注册表验证 Helm 客户端。然后，再次尝试安装步骤。

```
Error: INSTALLATION FAILED: Kubernetes cluster unreachable: the server has asked for the client to provide credentials
```

## UnsupportedFileSystemException: 方案 “s3” 不 FileSystem 是
<a name="troubleshooting-sparkop-filesys"></a>

您可能会在线程“main”中遇到以下异常情况：

```
org.apache.hadoop.fs.UnsupportedFileSystemException: No FileSystem for scheme "s3"
```

如果发生这种情况，请在 `SparkApplication` 规范中添加以下例外：

```
 hadoopConf:
   # EMRFS filesystem
   fs.s3.customAWSCredentialsProvider: com.amazonaws.auth.WebIdentityTokenCredentialsProvider
   fs.s3.impl: com.amazon.ws.emr.hadoop.fs.EmrFileSystem
   fs.AbstractFileSystem.s3.impl: org.apache.hadoop.fs.s3.EMRFSDelegate
   fs.s3.buffer.dir: /mnt/s3
   fs.s3.getObject.initialSocketTimeoutMilliseconds: "2000"
   mapreduce.fileoutputcommitter.algorithm.version.emr_internal_use_only.EmrFileSystem: "2"
   mapreduce.fileoutputcommitter.cleanup-failures.ignored.emr_internal_use_only.EmrFileSystem: "true"
 sparkConf:
   # Required for EMR Runtime
   spark.driver.extraClassPath: /usr/lib/hadoop-lzo/lib/*:/usr/lib/hadoop/hadoop-aws.jar:/usr/share/aws/aws-java-sdk/*:/usr/share/aws/emr/emrfs/conf:/usr/share/aws/emr/emrfs/lib/*:/usr/share/aws/emr/emrfs/auxlib/*:/usr/share/aws/emr/security/conf:/usr/share/aws/emr/security/lib/*:/usr/share/aws/hmclient/lib/aws-glue-datacatalog-spark-client.jar:/usr/share/java/Hive-JSON-Serde/hive-openx-serde.jar:/usr/share/aws/sagemaker-spark-sdk/lib/sagemaker-spark-sdk.jar:/home/hadoop/extrajars/*
   spark.driver.extraLibraryPath: /usr/lib/hadoop/lib/native:/usr/lib/hadoop-lzo/lib/native:/docker/usr/lib/hadoop/lib/native:/docker/usr/lib/hadoop-lzo/lib/native
   spark.executor.extraClassPath: /usr/lib/hadoop-lzo/lib/*:/usr/lib/hadoop/hadoop-aws.jar:/usr/share/aws/aws-java-sdk/*:/usr/share/aws/emr/emrfs/conf:/usr/share/aws/emr/emrfs/lib/*:/usr/share/aws/emr/emrfs/auxlib/*:/usr/share/aws/emr/security/conf:/usr/share/aws/emr/security/lib/*:/usr/share/aws/hmclient/lib/aws-glue-datacatalog-spark-client.jar:/usr/share/java/Hive-JSON-Serde/hive-openx-serde.jar:/usr/share/aws/sagemaker-spark-sdk/lib/sagemaker-spark-sdk.jar:/home/hadoop/extrajars/*
   spark.executor.extraLibraryPath: /usr/lib/hadoop/lib/native:/usr/lib/hadoop-lzo/lib/native:/docker/usr/lib/hadoop/lib/native:/docker/usr/lib/hadoop-lzo/lib/native
```