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spanner-client: Retry PDML on "Received unexpected EOS on DATA frame from server" #120

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thiagotnunes opened this issue Jul 29, 2020 · 0 comments · Fixed by #122
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spanner-client: Retry PDML on "Received unexpected EOS on DATA frame from server" #120

thiagotnunes opened this issue Jul 29, 2020 · 0 comments · Fixed by #122
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@larkee
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api: spanner Issues related to the googleapis/python-spanner API. priority: p2 Moderately-important priority. Fix may not be included in next release. type: bug Error or flaw in code with unintended results or allowing sub-optimal usage patterns.

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@thiagotnunes
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This bug is related to the Spanner client library.

For long lived transactions (>= 30 minutes), in the case of large PDML changes, it is possible that the gRPC connection is terminated with an error "Received unexpected EOS on DATA frame from server".

In this case, we need to retry the transaction either with the received resume token obtained on reading the stream or from scratch. This will ensure that the PDML transaction continues to execute until it is successful or a hard timeout is reached.

We have already implemented such change in the Java client library, for more information see this PR: googleapis/java-spanner#360.

In order to test the fix, we can use a large spanner database. Please speak to @thiagotnunes for more details.
@product-auto-label product-auto-label bot added the api: spanner Issues related to the googleapis/python-spanner API. label Jul 29, 2020
@yoshi-automation yoshi-automation added the triage me I really want to be triaged. label Jul 29, 2020
@skuruppu skuruppu added type: bug Error or flaw in code with unintended results or allowing sub-optimal usage patterns. priority: p2 Moderately-important priority. Fix may not be included in next release. and removed triage me I really want to be triaged. labels Jul 31, 2020
@larkee larkee mentioned this issue Aug 4, 2020
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@larkee larkee

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api: spanner Issues related to the googleapis/python-spanner API. priority: p2 Moderately-important priority. Fix may not be included in next release. type: bug Error or flaw in code with unintended results or allowing sub-optimal usage patterns.
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fix: resume iterator on EOS internal error larkee/python-spanner
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@thiagotnunes @skuruppu @larkee @yoshi-automation