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fix(bigquery-jdbc): poll the JSON reference queue and release processed finalizers - #14719

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Neenu1995 merged 11 commits into
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neenu/fix-json-resource-cleanup
Oct 22, 2026
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fix(bigquery-jdbc): poll the JSON reference queue and release processed finalizers#14719
Neenu1995 merged 11 commits into
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neenu/fix-json-resource-cleanup

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@Neenu1995 Neenu1995 commented Oct 21, 2026 •
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b/524270586

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Neenu1995 requested review from a team as code owners October 21, 2026 18:41
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This pull request refactors the JDBC driver's logging and garbage collection daemon to prevent memory and resource leaks. Specifically, it changes several 'BigQueryJdbcCustomLogger' instances to static fields to avoid registering excessive child loggers, and refactors 'BigQueryDaemonPollingTask' to use instance-specific reference queues and finalizer lists. Feedback on the changes highlights a potential issue where an unchecked exception thrown during resource finalization could silently terminate the daemon thread, leading to permanent resource leaks; wrapping the loop's body in a 'try-catch-finally' block is recommended to ensure the thread remains alive and references are always cleared.

Comment thread java-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/BigQueryDaemonPollingTask.java
@Neenu1995
Neenu1995 changed the base branch from main to neenu/fix-logger-leak October 21, 2026 19:00
@Neenu1995
Neenu1995 requested review from a team as code owners October 21, 2026 19:00
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logachev commented Oct 21, 2026

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Note that this PR is not targeting main branch

Base automatically changed from neenu/fix-logger-leak to main October 22, 2026 00:35
@Neenu1995
Neenu1995 merged commit 1b7d00d into main Oct 22, 2026
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@Neenu1995
Neenu1995 deleted the neenu/fix-json-resource-cleanup branch October 22, 2026 13:36
@release-please release-please Bot mentioned this pull request Oct 22, 2026
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jinseopkim0 pushed a commit that referenced this pull request Oct 23, 2026
@release-please
chore(main): release 1.94.0 (#14723)
9ca7e9e 
🤖 I have created a release *beep* *boop*
---


<details><summary>1.94.0</summary>

##
[1.94.0](v1.93.0...v1.94.0)
(2026-10-22)


### Features

* **auth:** request certificate-bound tokens for agent identities by
([01eaba1](01eaba1))
* **bigquery-jdbc:** Add clearcut telemetry client
([#14607](#14607))
([c702438](c702438))
* **bigquery-jdbc:** expose QueryStatistics for jobless queries
([#14596](#14596))
([15f472c](15f472c))
* **bigquery:** expose QueryStatistics from TableResult
([#14588](#14588))
([40b2b1a](40b2b1a))
* **bigtable:** add per-method session diversion configuration
([#14681](#14681))
([042dd3e](042dd3e))
* **bigtable:** support SessionCheckAndMutateRow on the session client
([#14565](#14565))
([86de9c1](86de9c1))
* **bigtable:** support SessionReadModifyWriteRow on the session client
([#14585](#14585))
([8e653b2](8e653b2))
* **firestore:** DML
([#14703](#14703))
([11bc071](11bc071))
* **gax:** implement operation-level client request spans (T3)
([#14549](#14549))
([275063b](275063b))
* **gax:** link attempt spans to parent context and clean up on
operation completion
([#14459](#14459))
([0c481bd](0c481bd))
* **gax:** standardize mapping terminal resumable upload exceptions to
ApiException
([#14624](#14624))
([d4961f0](d4961f0))
* **google/devicesandservices/health/v4beta:** add health v4beta
([#14600](#14600))
([95f863c](95f863c))
* **google/shopping/merchant/reviews/v1:** add shopping-merchant-reviews
([#14724](#14724))
([13310c7](13310c7))
* include writerId as part of trace id
([#13488](#13488))
([ffa8063](ffa8063))
* log actionable errors on operation failure in LoggingTracer
([#14460](#14460))
([27559f4](27559f4))
* populate client_stats in AppendRowsRequest
([#14614](#14614))
([a7a0098](a7a0098))
* **spanner:** add option to create GcpFallbackChannel per channel
instead of per pool
([#14501](#14501))
([74f7591](74f7591))


### Bug Fixes

* **api-common:** validate path template variables against dot segments
([#14641](#14641))
([4ad59e2](4ad59e2))
* **auth:** fix serialization gaps in DownscopedCredentials and
UrlIdentityPoolSubjectTokenSupplier
([#14341](#14341))
([a3e3324](a3e3324))
* **bigquery-jdbc:** ensure JDBC uses PQC-compliant algorithm by default
([#14560](#14560))
([b0ffe3d](b0ffe3d))
* **bigquery-jdbc:** fix Exception handling
([#14566](#14566))
([3e7a206](3e7a206))
* **bigquery-jdbc:** fix missing logger instances
([#14733](#14733))
([0e822dc](0e822dc))
* **bigquery-jdbc:** fix pqc working in proxy env
([#14599](#14599))
([ceb45b4](ceb45b4))
* **bigquery-jdbc:** format nested ARRAY fields as valid JSON in
Struct.toString()
([#14720](#14720))
([bc0126a](bc0126a))
* **bigquery-jdbc:** format TIMESTAMP as UTC in getString and add
multi-zone TIMESTAMP(12) tests
([#14666](#14666))
([e666612](e666612))
* **bigquery-jdbc:** honor `Calendar` timezone and prevent
`ClassCastException` in ResultSet temporal getters
([#14657](#14657))
([7dd2b37](7dd2b37))
* **bigquery-jdbc:** limit Storage Read API Arrow batch queue to 32
batches
([#14709](#14709))
([d339c41](d339c41))
* **bigquery-jdbc:** normalize `setTime` from Calendar zone to JVM zone
([#14660](#14660))
([54d2bc6](54d2bc6))
* **bigquery-jdbc:** poll the JSON reference queue and release processed
finalizers
([#14719](#14719))
([1b7d00d](1b7d00d))
* **bigquery-jdbc:** preserve `Timestamp` instant in `PreparedStatement`
and `CallableStatement` Calendar overloads
([#14640](#14640))
([3b02a44](3b02a44))
* **bigquery-jdbc:** preserve the instant on the TIMESTAMP write path
and bind LocalDateTime as STRING
([#14647](#14647))
([2106e26](2106e26))
* **bigquery-jdbc:** stop per-ResultSet logger registration leak
([#14718](#14718))
([e83c768](e83c768))
* **bigquery-jdbc:** stop producer and release resources on
ResultSet.close
([#14712](#14712))
([6b99452](6b99452))
* **bigquery:** fix invalid mappings in domain models
([#14646](#14646))
([17048ed](17048ed))
* **bigquery:** remove duplicate google-cloud-storage dependency
([#14586](#14586))
([ab6173e](ab6173e))
* **datastore:** allow any gRPC TransportChannelProvider in
DatastoreOptions
([#14478](#14478))
([d9a8db5](d9a8db5))
* **datastore:** update emulator zip checksum for 2.3.1
([#14592](#14592))
([fb73ed5](fb73ed5))
* **deps:** update dependency
com.google.api-client:google-api-client-bom to v2.9.2
([#14725](#14725))
([1ffa467](1ffa467))
* **gax-httpjson:** gracefully handle error details with unrecognized
types
([#14612](#14612))
([7295640](7295640))
* revise health metrics inflightBytes to become inflightBytesMax
([#14613](#14613))
([44a12ef](44a12ef))
* **showcase:** update parent context retry tests for operation span in
ITOtelTracing
([#14673](#14673))
([312b5ea](312b5ea))
* **spanner:** increase max inbound message size from 256MB to 300MB
([#14551](#14551))
([70c7439](70c7439))
* **spanner:** increase max inbound message size from 256MB to 300MB as
([70c7439](70c7439))
* **spanner:** prevent stream leaks and race conditions on result set
close
([#14665](#14665))
([013b49b](013b49b))
* **spanner:** support autoscaling config, edition, and positive
capacity in cloud instance actions
([#14574](#14574))
([004f0fd](004f0fd))


### Performance Improvements

* **bigquery:** defer blocking jobs.get RPC in QueryPageFetcher until
getNextPage()
([#14650](#14650))
([6183b63](6183b63))


### Dependencies

* Upgrade jackson-bom to v2.22.4
([#14701](#14701))
([09ce4c5](09ce4c5))


### Documentation

* **auth:** clarify quota project behavior on ImpersonatedCredentials
([#14597](#14597))
([4e5a0d0](4e5a0d0))
* **pubsub:** Create a Cloud Pub/Sub sample for publishing with hedging
([#14623](#14623))
([9de611f](9de611f))
* **pubsub:** regenerate README.md sample table
([#14643](#14643))
([5394618](5394618)),
refs
[#14543](#14543)
</details>

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

---------

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
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@logachev logachev logachev approved these changes
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