stym06 opened a new issue #3677:
URL: https://github.com/apache/hudi/issues/3677
**Describe the problem you faced**
I'm running the DeltaStreamer application in continuous mode writing data
into Azure blob storage. It runs fine for a few days, but exits with the
following error.
`Caused by: java.net.UnknownHostException: xyz.blob.core.windows.net`
**To Reproduce**
Steps to reproduce the behavior:
1. Run DeltaStreamer with below configs:
`arguments:
- "--table-type"
- "COPY_ON_WRITE"
- "--props"
- "/opt/spark/hudi/config-azure/source.properties"
- "--schemaprovider-class"
- "org.apache.hudi.utilities.schema.SchemaRegistryProvider"
- "--source-class"
- "org.apache.hudi.utilities.sources.AvroKafkaSource"
- "--target-base-path"
-
"wasb://<container>@<account>.blob.core.windows.net/stage/db.table/"
- "--target-table"
- "db.table"
- "--op"
- "UPSERT"
- "--source-ordering-field"
- "__ts_ms"
- "--continuous"
- "--min-sync-interval-seconds"
- "10"`
**Expected behavior**
The application should continue writing after every 10 seconds gap
A clear and concise description of what you expected to happen.
**Environment Description**
* Hudi version : 0.8
* Spark version : 2.4.4
* Hive version : 3.0
* Hadoop version : 2.7.3
* Storage (HDFS/S3/GCS..) : WASB
* Running on Docker? (yes/no) : K8s
**Additional context**
Add any other context about the problem here.
**Stacktrace**
```21/09/15 13:16:45 ERROR HoodieDeltaStreamer: Shutting down delta-sync due
to exception
org.apache.hadoop.fs.azure.AzureException:
com.microsoft.azure.storage.StorageException: The server encountered an unknown
failure:
at
org.apache.hadoop.fs.azure.AzureNativeFileSystemStore.retrieveMetadata(AzureNativeFileSystemStore.java:1930)
at
org.apache.hadoop.fs.azure.NativeAzureFileSystem.getFileStatus(NativeAzureFileSystem.java:1592)
at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:1426)
at
org.apache.hudi.utilities.deltastreamer.DeltaSync.refreshTimeline(DeltaSync.java:224)
at
org.apache.hudi.utilities.deltastreamer.DeltaSync.syncOnce(DeltaSync.java:257)
at
org.apache.hudi.utilities.deltastreamer.HoodieDeltaStreamer$DeltaSyncService.lambda$startService$0(HoodieDeltaStreamer.java:587)
at
java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1590)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: com.microsoft.azure.storage.StorageException: The server
encountered an unknown failure:
at
com.microsoft.azure.storage.StorageException.translateException(StorageException.java:178)
at
com.microsoft.azure.storage.core.ExecutionEngine.executeWithRetry(ExecutionEngine.java:214)
at
com.microsoft.azure.storage.blob.CloudBlob.exists(CloudBlob.java:1963)
at
com.microsoft.azure.storage.blob.CloudBlob.exists(CloudBlob.java:1950)
at
org.apache.hadoop.fs.azure.StorageInterfaceImpl$CloudBlobWrapperImpl.exists(StorageInterfaceImpl.java:313)
at
org.apache.hadoop.fs.azure.AzureNativeFileSystemStore.retrieveMetadata(AzureNativeFileSystemStore.java:1865)
... 9 more
Caused by: java.net.UnknownHostException: xyz.blob.core.windows.net
at
java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at java.net.Socket.connect(Socket.java:538)
at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
at sun.net.www.http.HttpClient.New(HttpClient.java:339)
at sun.net.www.http.HttpClient.New(HttpClient.java:357)
at
sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
at
sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
at
sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
at
sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
at
sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1564)
at
sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
at
java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)
at
com.microsoft.azure.storage.core.ExecutionEngine.executeWithRetry(ExecutionEngine.java:124)
... 13 more```
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