HADOOP-19531. [ABFS][FnsOverBlob] Streaming List Path Result Should Happen Inside Retry Loop#7582
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| LOG.error("Unable to deserialize list results for Uri {}", uri.toString(), ex); | ||
| throw new AbfsDriverException(ERR_DFS_LIST_PARSING, ex); | ||
| LOG.error("Unable to deserialize list results for Uri {}", uri != null ? uri.toString(): "NULL", ex); | ||
| throw new AbfsDriverException(ex); |
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throw new AbfsDriverException(ERR_DFS_LIST_PARSING, ex); add the message here as well
| throw new AbfsDriverException(ERR_BLOB_LIST_PARSING, e); | ||
| } catch (AbfsDriverException ex) { | ||
| // Throw as it is to avoid multiple wrapping. | ||
| LOG.error("Unable to deserialize list results for Uri {}", uri != null ? uri.toString(): "NULL", ex); |
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uri should not be null if we are reaching till this part of the code
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uri can be null for the cases where this API is called by internal operations like in create flow.
If list call is coming from user, uri won't be null.
| blockIdList = client.parseBlockListResponse(stream); | ||
| } | ||
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| private void parseListPathResponse(final InputStream stream) throws IOException { |
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| } | ||
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| private void parseListPathResponse(final InputStream stream) throws IOException { | ||
| if (stream == null || blockIdList != null) { |
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how is blockIdList check relevant here ?
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Was buggy, fixed it
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| throw new AbfsDriverException(e); | ||
| return filterDuplicateEntriesAndRenamePendingFiles(listResultSchema, uri); | ||
| } catch (SAXException | IOException ex) { | ||
| throw new AbfsDriverException(ERR_BLOB_LIST_PARSING, ex); |
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NIT: We can add URI in the error message for better visibility.
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URI is already in log messages.
| if (stream == null) { | ||
| return null; | ||
| } | ||
| try (InputStream stream = new ByteArrayInputStream(result.getListResultData())) { |
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Will there be any issue here in case result.getListResultData() is null?
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Yes, it can lead to NPE. Have modified to catch all the exceptions and wrap it around AbfsDriverException and throw back to user
| log.debug("IO Error: ", ex); | ||
| throw ex; | ||
| } catch (Exception ex) { | ||
| log.warn("Unexpected error: {} {}: {}", |
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Why do we need both log.warn and log.debug here?
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We were doing same for other type of exceptions.
| public void testKacIsClosed() throws Throwable { | ||
| Configuration configuration = new Configuration(getRawConfiguration()); | ||
| configuration.set(FS_AZURE_NETWORKING_LIBRARY, APACHE_HTTP_CLIENT.name()); | ||
| configuration.unset(FS_AZURE_METRIC_FORMAT); |
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why do we need to unset this config here?
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This test was failing when this config was present in test xml files
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| Mockito.doReturn(spiedStore).when(spiedFs).getAbfsStore(); | ||
| Mockito.doReturn(spiedClient).when(spiedStore).getClient(); | ||
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| Mockito.doThrow(new SocketException(CONNECTION_RESET_MESSAGE)).when(spiedClient).filterDuplicateEntriesAndRenamePendingFiles(any(), any()); |
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Can we reduce the retry count and verify that request was retried ?
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This particular test is to make sure retry does not happen as here exception is injected in parsing list result from local stream.
I have modified the test testListPathTracingContext to assert that exception thrown within httpOperation.processResponse() is retried.
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💔 -1 overall
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🎊 +1 overall
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…appen Inside Retry Loop (apache#7582) Contributed by Anuj Modi Reviewed by Anmol Asrani, Manish Bhatt, Manika Joshi Signed off by: Anuj Modi<anujmodi@apache.org>
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Description of PR
Listing APIs on both DFS and Blob Endpoints return response as part of response body and has to be read from an Socket Input Stream.
Any network error occuring while reading the stream should be retried.
Today, this parsing happens in client and such errors are not retried.
This change fixes this behavior
How was this patch tested?
Added a few more tests and test suite ran for validation