在Synapse Studio访问ADLS Gen2时遇Error 401认证失败问题排查

问题场景 #

在Azure Synapse Studio中执行以下Spark命令时，出现401认证失败错误：

df = spark.read.load('abfss://storagefs1@storage1.dfs.core.windows.net/somefilepath.parquet', format='parquet')

关键信息说明 #

• 已为自身配置该存储账户的Storage Blob Data Contributor角色
• 同事运行完全相同的Notebook可正常访问
• 对比过已分配角色，二者基本一致
• 已将个人电脑IP添加至存储账户防火墙例外
• 使用Azure Storage Explorer可正常访问和编辑该存储账户

报错详情 #

调用o755.load时发生错误：
java.nio.file.AccessDeniedException: 操作失败："服务器未能验证请求。请参考www-authenticate标头中的信息。", 401, HEAD, https://storage1.dfs.core.windows.net/storagefs1/?upn=false&action=getAccessControl&timeout=90
at org.apache.hadoop.fs.azurebfs.AzureBlobFileSystem.checkException(AzureBlobFileSystem.java:1185)
at org.apache.hadoop.fs.azurebfs.AzureBlobFileSystem.getFileStatus(AzureBlobFileSystem.java:504)
at org.apache.hadoop.fs.FileSystem.isDirectory(FileSystem.java:1713)
at org.apache.spark.sql.execution.streaming.FileStreamSink$.hasMetadata(FileStreamSink.scala:47)
at org.apache.spark.sql.execution.datasources.DataSource.resolveRelation(DataSource.scala:377)
at org.apache.spark.sql.DataFrameReader.loadV1Source(DataFrameReader.scala:332)
at org.apache.spark.sql.DataFrameReader.$anonfun$load$3(DataFrameReader.scala:315)
at scala.Option.getOrElse(Option.scala:189)
at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:315)
at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:241)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244)
at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
at py4j.Gateway.invoke(Gateway.java:282)
at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
at py4j.commands.CallCommand.execute(CallCommand.java:79)
at py4j.GatewayConnection.run(GatewayConnection.java:238)
at java.lang.Thread.run(Thread.java:750)
Caused by: 操作失败："服务器未能验证请求。请参考www-authenticate标头中的信息。", 401, HEAD, https://storage1.dfs.core.windows.net/storagefs1/?upn=false&action=getAccessControl&timeout=90
at org.apache.hadoop.fs.azurebfs.services.AbfsRestOperation.execute(AbfsRestOperation.java:207)
at org.apache.hadoop.fs.azurebfs.services.AbfsClient.getAclStatus(AbfsClient.java:783)
at org.apache.hadoop.fs.azurebfs.services.AbfsClient.getAclStatus(AbfsClient.java:765)
at org.apache.hadoop.fs.azurebfs.AzureBlobFileSystemStore.getIsNamespaceEnabled(AzureBlobFileSystemStore.java:294)
at org.apache.hadoop.fs.azurebfs.AzureBlobFileSystemStore.getFileStatus(AzureBlobFileSystemStore.java:785)
at org.apache.hadoop.fs.azurebfs.AzureBlobFileSystem.getFileStatus(AzureBlobFileSystem.java:502)
... 19 more

---------- ~/cluster-env/clonedenv/lib/python3.8/site-packages/py4j/java_gateway.py in call(self, *args) 1303 answer = self.gateway_client.send_command(command)
-> 1304 return_value = get_return_value( 1305 answer, self.gateway_client, self.target_id, self.name)

/opt/spark/python/lib/pyspark.zip/pyspark/sql/utils.py in deco(a, *kw) 110 try:
-> 111 return f(a, *kw) 112 except py4j.protocol.Py4JJavaError as e:

~/cluster-env/clonedenv/lib/python3.8/site-packages/py4j/protocol.py in get_return_value(answer, gateway_client, target_id, name) 325 if answer[1] == REFERENCE_TYPE:
-> 326 raise Py4JJavaError( 327 "An error occurred while calling {0}{1}{2}.\n".

Py4JJavaError: 调用o755.load时发生错误：
java.nio.file.AccessDeniedException: 操作失败："服务器未能验证请求。请参考www-authenticate标头中的信息。", 401, HEAD, https://storage1.dfs.core.windows.net/storagefs1/?upn=false&action=getAccessControl&timeout=90
at org.apache.hadoop.fs.azurebfs.AzureBlobFileSystem.checkException(AzureBlobFileSystem.java:1185)
at org.apache.hadoop.fs.azurebfs.AzureBlobFileSystem.getFileStatus(AzureBlobFileSystem.java:504)
at org.apache.hadoop.fs.FileSystem.isDirectory(FileSystem.java:1713)
at org.apache.spark.sql.execution.streaming.FileStreamSink$.hasMetadata(FileStreamSink.scala:47)
at org.apache.spark.sql.execution.datasources.DataSource.resolveRelation(DataSource.scala:377)
at org.apache.spark.sql.DataFrameReader.loadV1Source(DataFrameReader.scala:332)
at org.apache.spark.sql.DataFrameReader.$anonfun$load$3(DataFrameReader.scala:315)
at scala.Option.getOrElse(Option.scala:189)
at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:315)
at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:241)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244)
at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
at py4j.Gateway.invoke(Gateway.java:282)
at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
at py4j.commands.CallCommand.execute(CallCommand.java:79)
at py4j.GatewayConnection.run(GatewayConnection.java:238)
at java.lang.Thread.run(Thread.java:750)
Caused by: 操作失败："服务器未能验证请求。请参考www-authenticate标头中的信息。", 401, HEAD, https://storage1.dfs.core.windows.net/storagefs1/?upn=false&action=getAccessControl&timeout=90
at org.apache.hadoop.fs.azurebfs.services.AbfsRestOperation.execute(AbfsRestOperation.java:207)
at org.apache.hadoop.fs.azurebfs.services.AbfsClient.getAclStatus(AbfsClient.java:783)
at org.apache.hadoop.fs.azurebfs.services.AbfsClient.getAclStatus(AbfsClient.java:765)
at org.apache.hadoop.fs.azurebfs.AzureBlobFileSystemStore.getIsNamespaceEnabled(AzureBlobFileSystemStore.java:294)
at org.apache.hadoop.fs.azurebfs.AzureBlobFileSystemStore.getFileStatus(AzureBlobFileSystemStore.java:785)
at org.apache.hadoop.fs.azurebfs.AzureBlobFileSystem.getFileStatus(AzureBlobFileSystem.java:502)
... 19 more

可能的原因 #

• RBAC权限延迟：Azure角色权限一般需要5-15分钟才能生效，即使刚配置完也可能存在延迟。等待一段时间后重试，或注销并重新登录Synapse Studio。
• Synapse会话身份令牌过期：当前Synapse Studio会话可能使用了旧的身份令牌，未获取到最新权限。关闭当前窗口、清除浏览器缓存后重新登录，或使用隐私窗口测试。
• ADLS Gen2 ACL权限冲突：虽然你拥有RBAC角色，但目标容器或文件夹的ACL权限可能覆盖了RBAC设置。检查目标路径的ACL配置，确保你的账号具备读取权限。
• Spark集群配置差异：同事使用的集群可能配置了服务主体/托管身份访问存储，而你的集群使用用户身份验证。对比集群的认证配置，确认是否存在差异。
• 用户UPN识别问题：错误信息中的upn=false提示Synapse可能未正确识别你的用户主体名称。检查Azure AD账号是否有多个别名，或确认Synapse的身份识别逻辑是否正常。
• 存储防火墙范围不足：Synapse Spark集群运行在Azure内部，其出站IP可能不在存储账户的防火墙允许列表中。检查存储账户防火墙是否开启“允许Azure服务访问”，或添加Synapse工作区的出站IP到例外列表。

内容的提问来源于stack exchange，提问作者Samer Aamar