# \[RELEASE\] ScyllaDB Java Driver 3.11.5.14

**URL:** <https://forum.scylladb.com/t/release-scylladb-java-driver-3-11-5-14/5354>\
**Category:** Release Notes\
**Tags:** release, drivers, driver-release, java-driver\
**Created:** [April 23, 2026, 8:22am UTC](https://forum.scylladb.com/t/release-scylladb-java-driver-3-11-5-14/5354 "2026-04-23T08:22:22Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![nikagra](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.scylladb.com/nikagra/32/1923_2.png) [@nikagra](https://forum.scylladb.com/u/nikagra)\
**Post date:** [April 23, 2026, 8:22am UTC](https://forum.scylladb.com/t/release-scylladb-java-driver-3-11-5-14/5354/1 "2026-04-23T08:22:22Z")

</div>

We are pleased to announce the release of **ScyllaDB Java Driver 3.11.5.14** 🎉

The ScyllaDB Java Driver is an open-source, asynchronous Java client for ScyllaDB, fully compatible with Apache Cassandra. You can find it on [GitHub](https://github.com/scylladb/java-driver) and [Maven Central](https://central.sonatype.com/artifact/com.scylladb/java-driver-core).

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## 🐛 Bug Fixes & Improvements

### Improved driver-side timeout logging ([#867](https://github.com/scylladb/java-driver/pull/867))

Previously, when an `OperationTimedOutException` was raised, the log output provided no context about _why_ it happened. Two distinct failure modes were indistinguishable in the logs:

1. **Pool contention** — the request was queued inside the driver waiting to borrow a connection, and the cumulative wait exceeded `readTimeoutMillis`. The request may never have reached the server.

2. **Server-side slowness** — the request reached the server but the server took longer than `readTimeoutMillis` to respond (e.g. due to a `reader_concurrency_semaphore` stall). The driver gave up, but the server may still be processing the request.

This release adds a new `WARN`-level log line emitted immediately before `OperationTimedOutException` is thrown:

Code

```auto
[<execution-id>] Driver-side timeout waiting for response from <host> —
    configured timeout: <N>ms,
    connection in-flight: <N>,
    pool pending borrows: <N>,
    pool total in-flight: <N>

```

**How to interpret the output:**

| Field | Meaning |
| --- | --- |
| `configured timeout` | The `readTimeoutMillis` value in effect — confirms whether a per-statement or driver-wide timeout was used |
| `connection in-flight` | Requests currently awaiting a response on this specific connection |
| `pool pending borrows` | Requests waiting to acquire _any_ connection from the pool — a non-zero value indicates pool contention |
| `pool total in-flight` | Total in-flight requests across all connections to this host |

**Quick diagnosis guide:**

- `pool pending borrows > 0` → pool contention; requests are queuing inside the driver before reaching the server

- `pool pending borrows = 0` + high `connection in-flight` → server-side slowness; requests sent but not answered within the timeout

- Unexpectedly small `configured timeout` → a non-default `readTimeoutMillis` may be set somewhere (e.g. in a framework wrapper)

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## 📦 Getting the Release

**Maven:**

XML

```xml
<dependency>
  <groupId>com.scylladb</groupId>
  <artifactId>java-driver-core</artifactId>
  <version>3.11.5.14</version>
</dependency>

```

**GitHub Release:** [https://github.com/scylladb/java-driver/releases/tag/3.11.5.14](https://github.com/scylladb/java-driver/releases/tag/3.11.5.14)

**Full Changelog:** [https://github.com/scylladb/java-driver/compare/3.11.5.13…3.11.5.14](https://github.com/scylladb/java-driver/compare/3.11.5.13...3.11.5.14)

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## 🙏 Contributors

Thanks to everyone who contributed to this release:

- @nikagra

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We welcome questions, bug reports, and feature requests — feel free to open an issue on [GitHub](https://github.com/scylladb/java-driver/issues) or start a discussion here on the forum!