[ISSUE #6450][Enhancement✨] Remove useless code from pull_message_processor.rs#6524
[ISSUE #6450][Enhancement✨] Remove useless code from pull_message_processor.rs#6524
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WalkthroughSimplified end-offset handling in broker pull logic and minor refactors: iterator-pattern changes in utilities and map iteration, guarded match patterns for specific response codes, and extraction refactor in admin CLI. No public API signature changes. Changes
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Pull request overview
This PR removes a commented-out code fragment from pull_message_processor.rs that was checking if request_header.max_msg_nums.is_some() in a conditional statement. The commented-out condition is unnecessary because max_msg_nums is defined as a non-optional i32 field (marked with #[required]) in the PullMessageRequestHeader struct, meaning it cannot be None and the check would never compile.
Changes:
- Removed commented-out condition
/* && request_header.max_msg_nums.is_some() */from the if statement on line 230
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Caution
Some comments are outside the diff and can’t be posted inline due to platform limitations.
⚠️ Outside diff range comments (1)
rocketmq-broker/src/processor/pull_message_processor.rs (1)
230-234:⚠️ Potential issue | 🟠 MajorPrevent
i64 -> i32truncation inmax_msg_numsclampLine 232 uses
as i32on an offset span without bounds checking. Bothend_offsetandstart_offsetarei64, so if the span exceedsi32::MAX(~2.1 billion), the cast silently truncates and produces an invalidmax_msg_nums(potentially negative), breaking pull behavior on large queues.🛠️ Suggested fix
if mapping_item.check_if_end_offset_decided() { - request_header.max_msg_nums = std::cmp::min( - (mapping_item.end_offset - mapping_item.start_offset) as i32, - request_header.max_msg_nums, - ); + let span = mapping_item + .end_offset + .saturating_sub(mapping_item.start_offset); + let span_i32 = i32::try_from(span).unwrap_or(i32::MAX); + request_header.max_msg_nums = span_i32.min(request_header.max_msg_nums); }🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@rocketmq-broker/src/processor/pull_message_processor.rs` around lines 230 - 234, The span calculation for max_msg_nums casts (mapping_item.end_offset - mapping_item.start_offset) as i32 which can overflow/truncate; instead compute the span in i64 using mapping_item.end_offset.saturating_sub(mapping_item.start_offset), clamp it to i32::MAX (and to zero) and then convert to i32 safely before taking the min with request_header.max_msg_nums; update the block around mapping_item.check_if_end_offset_decided() to use the saturating_sub result, cap it to i32::MAX, convert to i32, and then set request_header.max_msg_nums = std::cmp::min(clamped_span_i32, request_header.max_msg_nums) so no silent truncation or negative values occur (refer to mapping_item.end_offset, mapping_item.start_offset, and request_header.max_msg_nums).
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Outside diff comments:
In `@rocketmq-broker/src/processor/pull_message_processor.rs`:
- Around line 230-234: The span calculation for max_msg_nums casts
(mapping_item.end_offset - mapping_item.start_offset) as i32 which can
overflow/truncate; instead compute the span in i64 using
mapping_item.end_offset.saturating_sub(mapping_item.start_offset), clamp it to
i32::MAX (and to zero) and then convert to i32 safely before taking the min with
request_header.max_msg_nums; update the block around
mapping_item.check_if_end_offset_decided() to use the saturating_sub result, cap
it to i32::MAX, convert to i32, and then set request_header.max_msg_nums =
std::cmp::min(clamped_span_i32, request_header.max_msg_nums) so no silent
truncation or negative values occur (refer to mapping_item.end_offset,
mapping_item.start_offset, and request_header.max_msg_nums).
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🧹 Nitpick comments (1)
rocketmq-common/src/utils/util_all.rs (1)
214-220: Consider applying the same refactor towrite_shortfor consistency.The
write_shortfunction still uses the old pattern with mutablecurrent_pos. For consistency withwrite_int, consider refactoring it similarly.♻️ Suggested refactor for consistency
pub fn write_short(buffer: &mut [char], pos: usize, value: i16) { - let mut current_pos = pos; - for move_bits in (0..=12).rev().step_by(4) { - buffer[current_pos] = HEX_ARRAY[((value >> move_bits) & 0xF) as usize]; - current_pos += 1; + for (current_pos, move_bits) in (pos..).zip((0..=12).rev().step_by(4)) { + buffer[current_pos] = HEX_ARRAY[((value >> move_bits) & 0xF) as usize]; } }🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@rocketmq-common/src/utils/util_all.rs` around lines 214 - 220, The write_short function uses a mutable current_pos while write_int was refactored for immutability; update write_short (function write_short) to mirror write_int by removing current_pos and writing into buffer at pos + i (or equivalent) using an iterator/enumerate over the 4 nybbles (move_bits 12,8,4,0), computing HEX_ARRAY[((value >> move_bits) & 0xF) as usize] for each index so the function is consistent and avoids the mutable position variable.
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Nitpick comments:
In `@rocketmq-common/src/utils/util_all.rs`:
- Around line 214-220: The write_short function uses a mutable current_pos while
write_int was refactored for immutability; update write_short (function
write_short) to mirror write_int by removing current_pos and writing into buffer
at pos + i (or equivalent) using an iterator/enumerate over the 4 nybbles
(move_bits 12,8,4,0), computing HEX_ARRAY[((value >> move_bits) & 0xF) as usize]
for each index so the function is consistent and avoids the mutable position
variable.
Codecov Report❌ Patch coverage is Additional details and impacted files@@ Coverage Diff @@
## main #6524 +/- ##
==========================================
- Coverage 42.16% 42.15% -0.01%
==========================================
Files 946 946
Lines 132145 132140 -5
==========================================
- Hits 55714 55708 -6
- Misses 76431 76432 +1 ☔ View full report in Codecov by Sentry. 🚀 New features to boost your workflow:
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Summary by CodeRabbit
Bug Fixes
Refactor