feat: Use multiplex sessions for RW and Partition Ops #3996
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| Package | Type | Package file | Manager | Update | Change | |---|---|---|---|---|---| | [com.google.cloud:google-cloud-spanner](https://github.com/googleapis/java-spanner) | dependencies | misk/gradle/libs.versions.toml | gradle | minor | `6.97.1` -> `6.98.0` | --- ### Release Notes <details> <summary>googleapis/java-spanner (com.google.cloud:google-cloud-spanner)</summary> ### [`v6.98.0`](https://github.com/googleapis/java-spanner/blob/HEAD/CHANGELOG.md#6980-2025-07-31) ##### Features - Proto changes for an internal api ([675e90b](googleapis/java-spanner@675e90b)) - **spanner:** A new field `snapshot_timestamp` is added to message `.google.spanner.v1.CommitResponse` ([675e90b](googleapis/java-spanner@675e90b)) - Support Exemplar ([#​3997](googleapis/java-spanner#3997)) ([fcf0a01](googleapis/java-spanner@fcf0a01)) - Use multiplex sessions for RW and Partition Ops ([#​3996](googleapis/java-spanner#3996)) ([a882204](googleapis/java-spanner@a882204)) ##### Bug Fixes - **deps:** Update the Java code generator (gapic-generator-java) to 2.60.2 ([675e90b](googleapis/java-spanner@675e90b)) ##### Dependencies - Update dependency com.google.cloud:sdk-platform-java-config to v3.50.2 ([#​4004](googleapis/java-spanner#4004)) ([986c0e0](googleapis/java-spanner@986c0e0)) </details> --- ### Configuration 📅 **Schedule**: Branch creation - "after 6pm every weekday,before 2am every weekday" in timezone Australia/Melbourne, Automerge - At any time (no schedule defined). 🚦 **Automerge**: Enabled. ♻ **Rebasing**: Never, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate). GitOrigin-RevId: e7253efcfa4f9166c7524a0c1ef8947662193d8d
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spanner IT fails for `deleteAllById_doesNothingOnEmptyIds` test with error from Spanner: `INVALID_ARGUMENT: Failed to initialize transaction due to invalid mutation key.` **Trigger of this behavior change:** spanner activated multiplexed sessions by default in [googleapis/java-spanner#3996](googleapis/java-spanner#3996), which triggers this error. When issuing a write() with a Mutation that has an empty KeySet produces an exception in Multiplexed clients (see [pr](googleapis/java-spanner#4023)), but does a no-op in non-multiplexed ones. Unlike Regular session, multiplex session needs a valid mutation to generate a precommit token. Fixes #4046
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spanner IT fails for `deleteAllById_doesNothingOnEmptyIds` test with error from Spanner: `INVALID_ARGUMENT: Failed to initialize transaction due to invalid mutation key.` **Trigger of this behavior change:** spanner activated multiplexed sessions by default in [googleapis/java-spanner#3996](googleapis/java-spanner#3996), which triggers this error. When issuing a write() with a Mutation that has an empty KeySet produces an exception in Multiplexed clients (see [pr](googleapis/java-spanner#4023)), but does a no-op in non-multiplexed ones. Unlike Regular session, multiplex session needs a valid mutation to generate a precommit token. Fixes #4046
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Aug 19, 2025
spanner IT fails for `deleteAllById_doesNothingOnEmptyIds` test with error from Spanner: `INVALID_ARGUMENT: Failed to initialize transaction due to invalid mutation key.` **Trigger of this behavior change:** spanner activated multiplexed sessions by default in [googleapis/java-spanner#3996](googleapis/java-spanner#3996), which triggers this error. When issuing a write() with a Mutation that has an empty KeySet produces an exception in Multiplexed clients (see [pr](googleapis/java-spanner#4023)), but does a no-op in non-multiplexed ones. Unlike Regular session, multiplex session needs a valid mutation to generate a precommit token. Fixes #4046
zhumin8
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Aug 19, 2025
spanner IT fails for `deleteAllById_doesNothingOnEmptyIds` test with error from Spanner: `INVALID_ARGUMENT: Failed to initialize transaction due to invalid mutation key.` **Trigger of this behavior change:** spanner activated multiplexed sessions by default in [googleapis/java-spanner#3996](googleapis/java-spanner#3996), which triggers this error. When issuing a write() with a Mutation that has an empty KeySet produces an exception in Multiplexed clients (see [pr](googleapis/java-spanner#4023)), but does a no-op in non-multiplexed ones. Unlike Regular session, multiplex session needs a valid mutation to generate a precommit token. Fixes #4046
zhumin8
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Aug 19, 2025
backport fix from #4047 spanner IT fails for `deleteAllById_doesNothingOnEmptyIds` test with error from Spanner: `INVALID_ARGUMENT: Failed to initialize transaction due to invalid mutation key.` **Trigger of this behavior change:** spanner activated multiplexed sessions by default in [googleapis/java-spanner#3996](googleapis/java-spanner#3996), which triggers this error. When issuing a write() with a Mutation that has an empty KeySet produces an exception in Multiplexed clients (see [pr](googleapis/java-spanner#4023)), but does a no-op in non-multiplexed ones. Unlike Regular session, multiplex session needs a valid mutation to generate a precommit token. Fixes #4046
zhumin8
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Aug 19, 2025
Backport fix. spanner IT fails for `deleteAllById_doesNothingOnEmptyIds` test with error from Spanner: `INVALID_ARGUMENT: Failed to initialize transaction due to invalid mutation key.` **Trigger of this behavior change:** spanner activated multiplexed sessions by default in [googleapis/java-spanner#3996](googleapis/java-spanner#3996), which triggers this error. When issuing a write() with a Mutation that has an empty KeySet produces an exception in Multiplexed clients (see [pr](googleapis/java-spanner#4023)), but does a no-op in non-multiplexed ones. Unlike Regular session, multiplex session needs a valid mutation to generate a precommit token.
zhumin8
added a commit
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Aug 19, 2025
Backport fix. spanner IT fails for `deleteAllById_doesNothingOnEmptyIds` test with error from Spanner: `INVALID_ARGUMENT: Failed to initialize transaction due to invalid mutation key.` **Trigger of this behavior change:** spanner activated multiplexed sessions by default in [googleapis/java-spanner#3996](googleapis/java-spanner#3996), which triggers this error. When issuing a write() with a Mutation that has an empty KeySet produces an exception in Multiplexed clients (see [pr](googleapis/java-spanner#4023)), but does a no-op in non-multiplexed ones. Unlike Regular session, multiplex session needs a valid mutation to generate a precommit token. Fixes #4046
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Description:
Read-Write and Partition Ops transactions now use a single multiplexed session, instead of a session from the session pool. Multiplexed sessions can handle any number of queries and read-only, read-write and partition ops transactions transactions at the same time.
The use of multiplexed sessions can be disabled for read-write and partition-ops transactions by setting the environment variables.
See https://cloud.google.com/spanner/docs/sessions#multiplexed_sessions for more background information about multiplexed sessions.