fix: Boolean and LargeUtf8 column serialization in JSON and OTLP#636
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- Implemented explicit JSON serialization for Boolean columns (previously serialized as empty strings). - Added support for LargeUtf8 columns in output sinks. - Updated OTLP sink to correctly encode Boolean attributes as OTLP bool_value (field 2 in AnyValue). - Added regression tests for both JSON and OTLP output paths. - Fixed unrelated clippy warnings in transport tests to facilitate workspace builds. Co-authored-by: strawgate <6384545+strawgate@users.noreply.github.com>
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WalkthroughThis PR fixes a correctness issue where Boolean and LargeUtf8 Arrow columns were serializing as empty strings in JSON and OTLP output. Changes include: extending Possibly related PRs
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Actionable comments posted: 1
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Inline comments:
In `@crates/logfwd-output/src/lib.rs`:
- Around line 1252-1281: Add assertions for the third row (index 2) in the
boolean_and_large_utf8_serialization test to verify null handling: after
creating the batch with make_batch and using render(&batch, 2), assert that the
parsed JSON (serde_json::Value) has null for both "active" and "note". Update
the test function boolean_and_large_utf8_serialization to call render for row 2
and assert v2["active"].is_null() and v2["note"].is_null() so the test becomes
self-contained while still relying on render and make_batch.
🪄 Autofix (Beta)
Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
ℹ️ Review info
⚙️ Run configuration
Configuration used: Organization UI
Review profile: ASSERTIVE
Plan: Pro
Run ID: f2fba268-7c0f-4eff-9e34-934e3f8b0e73
📒 Files selected for processing (3)
crates/logfwd-io/tests/transport_e2e.rscrates/logfwd-output/src/lib.rscrates/logfwd-output/src/otlp_sink.rs
- Implemented explicit JSON serialization for Boolean columns (previously serialized as empty strings). - Added support for LargeUtf8 columns in output sinks. - Updated OTLP sink to correctly encode Boolean attributes as OTLP bool_value (field 2 in AnyValue). - Added regression tests for both JSON and OTLP output paths. - Addressed various workspace clippy warnings. Co-authored-by: strawgate <6384545+strawgate@users.noreply.github.com>
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Actionable comments posted: 2
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⚠️ Outside diff range comments (1)
crates/logfwd/tests/integration.rs (1)
256-264:⚠️ Potential issue | 🔴 CriticalFix mismatched raw string delimiters.
Line 256 opens with
r"but line 264 closes with"#. This is a syntax error — either change the opening tor#"or change the closing to"alone.If using
r#"..."#form (recommended for containing inner quotes in YAML), the opening must ber#".🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@crates/logfwd/tests/integration.rs` around lines 256 - 264, The raw string literal in the integration test is using mismatched delimiters (it starts with r" but ends with "#) which causes a syntax error; update the opening delimiter to r#" so the YAML block uses the r#"..."# raw-string form (the multiline string shown in the diff) ensuring the opening and closing delimiters match.
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Inline comments:
In `@crates/logfwd-output/src/otlp_sink.rs`:
- Around line 726-753: Add a second assertion in the encode_boolean_as_attribute
test to validate encoding of false: create a RecordBatch with a BooleanArray
containing Some(false), call sink.encode_batch(&batch, &make_metadata()) (same
helper functions make_sink/make_metadata), and assert that sink.encoder_buf
contains the byte sequence [0x10u8, 0x00] for the AnyValue bool_value false and
that the attribute key "active" is present (use contains_bytes and encoder_buf
as in the existing true case); this ensures the false varint (0x00) is emitted
correctly.
In `@crates/logfwd-output/tests/allocation_regression.rs`:
- Line 69: The test currently swallows the Result from write_row_json by using
"let _ = write_row_json(&batch, row, &cols, &mut buf);", which can hide
serialization failures and break allocation assertions; fix by either (A)
asserting success immediately (e.g., replace with write_row_json(&batch, row,
&cols, &mut buf).unwrap() or .expect("write_row_json failed")) or (B) change the
test function to return Result and propagate the error with
write_row_json(&batch, row, &cols, &mut buf)?; update all occurrences of the
write_row_json call so failures cause the test to fail instead of being ignored.
---
Outside diff comments:
In `@crates/logfwd/tests/integration.rs`:
- Around line 256-264: The raw string literal in the integration test is using
mismatched delimiters (it starts with r" but ends with "#) which causes a syntax
error; update the opening delimiter to r#" so the YAML block uses the r#"..."#
raw-string form (the multiline string shown in the diff) ensuring the opening
and closing delimiters match.
🪄 Autofix (Beta)
Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
ℹ️ Review info
⚙️ Run configuration
Configuration used: Organization UI
Review profile: ASSERTIVE
Plan: Pro
Run ID: 0f344cc8-6a03-4d12-872f-62aba9672657
📒 Files selected for processing (22)
crates/logfwd-arrow/src/streaming_builder.rscrates/logfwd-arrow/tests/allocation_regression.rscrates/logfwd-bench/benches/pipeline.rscrates/logfwd-config/src/lib.rscrates/logfwd-core/benches/scanner.rscrates/logfwd-core/examples/arrow_ipc_roundtrip.rscrates/logfwd-core/src/aggregator.rscrates/logfwd-core/src/pipeline/lifecycle.rscrates/logfwd-core/tests/compliance_data.rscrates/logfwd-core/tests/scanner_conformance.rscrates/logfwd-io/src/generator.rscrates/logfwd-io/src/metric_history.rscrates/logfwd-io/src/otlp_receiver.rscrates/logfwd-output/src/lib.rscrates/logfwd-output/src/otlp_sink.rscrates/logfwd-output/src/udp_sink.rscrates/logfwd-output/tests/allocation_regression.rscrates/logfwd-transform/src/lib.rscrates/logfwd/tests/allocation_e2e.rscrates/logfwd/tests/allocation_scaling.rscrates/logfwd/tests/compliance_file.rscrates/logfwd/tests/integration.rs
Comment on lines
+726
to
+753
| #[test] | ||
| fn encode_boolean_as_attribute() { | ||
| use arrow::array::BooleanArray; | ||
| let schema = Arc::new(Schema::new(vec![Field::new( | ||
| "active", | ||
| DataType::Boolean, | ||
| true, | ||
| )])); | ||
| let arr = BooleanArray::from(vec![Some(true)]); | ||
| let batch = RecordBatch::try_new(schema, vec![Arc::new(arr)]).unwrap(); | ||
|
|
||
| let mut sink = make_sink(); | ||
| sink.encode_batch(&batch, &make_metadata()); | ||
|
|
||
| // LogRecord field 6 tag: (6 << 3) | 2 = 0x32 | ||
| // KeyValue field 1 key tag: (1 << 3) | 2 = 0x0A, then "active" | ||
| // KeyValue field 2 value AnyValue tag: (2 << 3) | 2 = 0x12 | ||
| // AnyValue field 2 bool_value tag: (2 << 3) | 0 = 0x10, then 0x01 | ||
| let expected = [0x10u8, 0x01]; | ||
| assert!( | ||
| contains_bytes(&sink.encoder_buf, &expected), | ||
| "boolean attribute not found in encoded output" | ||
| ); | ||
| assert!( | ||
| contains_bytes(&sink.encoder_buf, b"active"), | ||
| "attribute key 'active' not found" | ||
| ); | ||
| } |
There was a problem hiding this comment.
🧹 Nitpick | 🔵 Trivial
Consider testing false value as well.
The test validates true → [0x10, 0x01]. Adding a false case would ensure the 0x00 varint is also emitted correctly. Optional since the encoding logic is straightforward.
Optional: extend test for false value
#[test]
fn encode_boolean_as_attribute() {
use arrow::array::BooleanArray;
let schema = Arc::new(Schema::new(vec![Field::new(
"active",
DataType::Boolean,
true,
)]));
- let arr = BooleanArray::from(vec![Some(true)]);
+ let arr = BooleanArray::from(vec![Some(true), Some(false)]);
let batch = RecordBatch::try_new(schema, vec![Arc::new(arr)]).unwrap();
let mut sink = make_sink();
sink.encode_batch(&batch, &make_metadata());
- // LogRecord field 6 tag: (6 << 3) | 2 = 0x32
- // KeyValue field 1 key tag: (1 << 3) | 2 = 0x0A, then "active"
- // KeyValue field 2 value AnyValue tag: (2 << 3) | 2 = 0x12
- // AnyValue field 2 bool_value tag: (2 << 3) | 0 = 0x10, then 0x01
- let expected = [0x10u8, 0x01];
+ // AnyValue field 2 bool_value: tag 0x10, then 0x01 for true
+ let expected_true = [0x10u8, 0x01];
+ let expected_false = [0x10u8, 0x00];
assert!(
- contains_bytes(&sink.encoder_buf, &expected),
- "boolean attribute not found in encoded output"
+ contains_bytes(&sink.encoder_buf, &expected_true),
+ "true boolean not found"
+ );
+ assert!(
+ contains_bytes(&sink.encoder_buf, &expected_false),
+ "false boolean not found"
);🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.
In `@crates/logfwd-output/src/otlp_sink.rs` around lines 726 - 753, Add a second
assertion in the encode_boolean_as_attribute test to validate encoding of false:
create a RecordBatch with a BooleanArray containing Some(false), call
sink.encode_batch(&batch, &make_metadata()) (same helper functions
make_sink/make_metadata), and assert that sink.encoder_buf contains the byte
sequence [0x10u8, 0x00] for the AnyValue bool_value false and that the attribute
key "active" is present (use contains_bytes and encoder_buf as in the existing
true case); this ensures the false varint (0x00) is emitted correctly.
|
|
||
| for row in 0..batch.num_rows() { | ||
| write_row_json(&batch, row, &cols, &mut buf); | ||
| let _ = write_row_json(&batch, row, &cols, &mut buf); |
There was a problem hiding this comment.
Do not swallow write_row_json failures in this regression test.
Line 69, Line 75, and Line 82 currently ignore Result. That can let serialization failures pass silently and invalidate allocation assertions.
Proposed fix
- let _ = write_row_json(&batch, row, &cols, &mut buf);
+ write_row_json(&batch, row, &cols, &mut buf)
+ .expect("write_row_json should succeed in warmup");
@@
- let _ = write_row_json(&batch, row, &cols, &mut buf);
+ write_row_json(&batch, row, &cols, &mut buf)
+ .expect("write_row_json should succeed in measured window 1");
@@
- let _ = write_row_json(&batch, row, &cols, &mut buf);
+ write_row_json(&batch, row, &cols, &mut buf)
+ .expect("write_row_json should succeed in measured window 2");Also applies to: 75-75, 82-82
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.
In `@crates/logfwd-output/tests/allocation_regression.rs` at line 69, The test
currently swallows the Result from write_row_json by using "let _ =
write_row_json(&batch, row, &cols, &mut buf);", which can hide serialization
failures and break allocation assertions; fix by either (A) asserting success
immediately (e.g., replace with write_row_json(&batch, row, &cols, &mut
buf).unwrap() or .expect("write_row_json failed")) or (B) change the test
function to return Result and propagate the error with write_row_json(&batch,
row, &cols, &mut buf)?; update all occurrences of the write_row_json call so
failures cause the test to fail instead of being ignored.
- Add explicit DataType::Boolean handling in JSON serialization to emit unquoted true/false/null. - Add support for DataType::LargeUtf8 in str_value() utility. - Add Boolean attribute support in OTLP sink using AnyValue.bool_value (field 2). - Fix various workspace Clippy warnings and formatting issues to ensure CI compliance. - Add regression tests for Boolean and LargeUtf8 serialization in both sinks. Co-authored-by: strawgate <6384545+strawgate@users.noreply.github.com>
There was a problem hiding this comment.
♻️ Duplicate comments (1)
crates/logfwd-output/src/lib.rs (1)
1256-1285:⚠️ Potential issue | 🟡 MinorAdd assertions for the null row in this regression test.
Line 1262 and Line 1269 create a third row with
None, but the test never validates row 2. That leaves boolean/null regression coverage incomplete.Suggested patch
// Row 1: false, "text" let json1 = render(&batch, 1); let v1: serde_json::Value = serde_json::from_str(&json1).unwrap(); assert_eq!(v1["active"], false); assert_eq!(v1["note"], "text"); + + // Row 2: null, null + let json2 = render(&batch, 2); + let v2: serde_json::Value = serde_json::from_str(&json2).unwrap(); + assert!(v2["active"].is_null()); + assert!(v2["note"].is_null()); }🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@crates/logfwd-output/src/lib.rs` around lines 1256 - 1285, The test boolean_and_large_utf8_serialization builds a third row with None values but never validates it; add assertions that render(&batch, 2) produces JSON where both "active" and "note" are null (e.g., parse the produced string with serde_json::from_str and assert v2["active"].is_null() and v2["note"].is_null()). Use the existing render and make_batch calls to locate the code.
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Duplicate comments:
In `@crates/logfwd-output/src/lib.rs`:
- Around line 1256-1285: The test boolean_and_large_utf8_serialization builds a
third row with None values but never validates it; add assertions that
render(&batch, 2) produces JSON where both "active" and "note" are null (e.g.,
parse the produced string with serde_json::from_str and assert
v2["active"].is_null() and v2["note"].is_null()). Use the existing render and
make_batch calls to locate the code.
ℹ️ Review info
⚙️ Run configuration
Configuration used: Organization UI
Review profile: ASSERTIVE
Plan: Pro
Run ID: 22838c11-029f-436e-80d8-f92186d6a0da
📒 Files selected for processing (1)
crates/logfwd-output/src/lib.rs
This was referenced Apr 5, 2026
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Boolean Arrow columns were serializing as empty strings in both JSON (stdout/HTTP) and OTLP sinks. This was because they fell back to a string conversion that only supported Utf8/Utf8View.
This PR:
str_valueto supportLargeUtf8.write_json_valueto explicitly handleBooleancolumns, emitting unquotedtrue/false.OtlpSinkto recognizeBooleancolumns and encode them using the OTLPbool_valuefield (confirmed as field 2 via AnyValue protobuf spec and verified with tests).crates/logfwd-output/src/lib.rsandcrates/logfwd-output/src/otlp_sink.rs.A few unrelated clippy fixes in
crates/logfwd-io/tests/transport_e2e.rswere included to reduce noise during workspace-wide testing.Fixes #605
PR created automatically by Jules for task 12889585171185946840 started by @strawgate