Efficient reliable UDP unicast, UDP multicast, and IPC message transport
This report summarizes scanner evidence for aeron-io/aeron, a Java project with 8,939 GitHub stars. SynthScan examined 494,586 lines of code across 1599 source files, recording 185 pattern matches distributed across 5 syntactic categories. The legacy adjusted pattern signal is 0.7 (Low pattern signal); it is not an authorship estimate.
Use the findings to ask whether maintainers can explain intent, verify dependencies, simplify unnecessary scaffolding, and focus review effort. Risk Payload v1 adds ownership, supply-chain, over-engineering, and review-effort vectors when available. These are prompts for human verification, not probabilities, security findings, or measured maintenance costs.
Use each vector to guide manual verification of the underlying findings.
Payload schema: 1.0.0 · Engine: 2.0.0 · Scoring: heuristic-density-v1 · Scan date: 2026-10-31.
Can maintainers explain intent, assumptions, and trade-offs? 171 finding(s).
Are imports declared and package/API names verified? 14 finding(s).
Are wrappers, guards, and repeated structures necessary? 1 finding(s).
Which changes need focused human review? 185 finding(s).
This chart tracks the legacy adjusted pattern score across scan runs. Changes can reflect source changes, scan coverage, or detector/scoring versions; they do not measure AI adoption or prove that a team refactored code. Compare runs only when their scoring versions are compatible. The dashed line tracks the raw pattern-hit count.
Groups findings by configured severity weight. Severity is not a confidence estimate, security rating, or proof that a package is missing. Verify imports against the project's manifests and inspect each finding in its local design context.
This horizontal bar chart shows where configured pattern scores accumulate across directories. Treat the bars as locations to inspect, not as evidence of authorship or code quality. Use the file-level findings to decide whether a directory needs a focused ownership, dependency, complexity, or review check.
The scanner identified 185 distinct pattern matches across 5 syntactic categories. Each entry below represents a discrete location in the source code where the engine recorded a detector match to inspect in context. Expand any category row to inspect the individual file paths, line numbers, code snippets, and the lexical context (CODE, COMMENT, or STRING) in which each match was detected.
Reading the findings table: The Severity column indicates the configured finding weight (CRITICAL / HIGH / MEDIUM / LOW). The Context column identifies whether the match occurred inside executable code, an inline comment, or a string literal — legacy comment-context matches receive a ×1.5 score weight. The ⚡ bolt icon marks clustered matches: three or more patterns within a 10-line window, each receiving an additional ×1.5 density multiplier under the legacy scoring model.
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| CRITICAL⚡ | …rc/test/java/io/aeron/archive/ArchiveMarkFileTest.java | 253 | io.aeron.archive.codecs.mark.v0.MarkFileHeaderDecoder.versionEncodingOffset(), | CODE |
| CRITICAL⚡ | …rc/test/java/io/aeron/archive/ArchiveMarkFileTest.java | 254 | io.aeron.archive.codecs.mark.v0.MarkFileHeaderDecoder.activityTimestampEncodingOffset()); | CODE |
| CRITICAL⚡ | …rc/test/java/io/aeron/archive/ArchiveMarkFileTest.java | 257 | new io.aeron.archive.codecs.mark.v0.MarkFileHeaderEncoder(); | CODE |
| CRITICAL⚡ | …rc/test/java/io/aeron/archive/ArchiveMarkFileTest.java | 321 | io.aeron.archive.codecs.mark.v1.MarkFileHeaderDecoder.versionEncodingOffset(), | CODE |
| CRITICAL⚡ | …rc/test/java/io/aeron/archive/ArchiveMarkFileTest.java | 322 | io.aeron.archive.codecs.mark.v1.MarkFileHeaderDecoder.activityTimestampEncodingOffset()); | CODE |
| CRITICAL⚡ | …rc/test/java/io/aeron/archive/ArchiveMarkFileTest.java | 325 | new io.aeron.archive.codecs.mark.v1.MarkFileHeaderEncoder(); | CODE |
| CRITICAL⚡ | …/aeron/cluster/SessionEventCodecCompatibilityTest.java | 41 | new io.aeron.cluster.codecs.v12.SessionEventEncoder(); | CODE |
| CRITICAL⚡ | …/aeron/cluster/SessionEventCodecCompatibilityTest.java | 43 | .wrapAndApplyHeader(buffer, 0, new io.aeron.cluster.codecs.v12.MessageHeaderEncoder()) | CODE |
| CRITICAL⚡ | …/aeron/cluster/SessionEventCodecCompatibilityTest.java | 53 | new io.aeron.cluster.codecs.v5.SessionEventDecoder(); | CODE |
| CRITICAL⚡ | …/aeron/cluster/SessionEventCodecCompatibilityTest.java | 55 | new io.aeron.cluster.codecs.v5.MessageHeaderDecoder(); | CODE |
| CRITICAL⚡ | …java/io/aeron/cluster/service/ClusterMarkFileTest.java | 287 | io.aeron.cluster.codecs.mark.v0.MarkFileHeaderDecoder.versionEncodingOffset(), | CODE |
| CRITICAL⚡ | …java/io/aeron/cluster/service/ClusterMarkFileTest.java | 288 | io.aeron.cluster.codecs.mark.v0.MarkFileHeaderDecoder.activityTimestampEncodingOffset()); | CODE |
| CRITICAL⚡ | …java/io/aeron/cluster/service/ClusterMarkFileTest.java | 291 | new io.aeron.cluster.codecs.mark.v0.MarkFileHeaderEncoder(); | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | CMakeLists.txt | 1 | # | COMMENT |
| LOW | aeron-client/src/test/c/CMakeLists.txt | 1 | # | COMMENT |
| LOW | aeron-client/src/test/c/aeron_image_test.cpp | 21 | COMMENT | |
| LOW | aeron-client/src/test/c/aeron_client_conductor_test.cpp | 21 | #include <gtest/gtest.h> | COMMENT |
| LOW | aeron-client/src/test/c/aeron_client_conductor_test.cpp | 41 | COMMENT | |
| LOW | …client/src/test/c/aeron_exclusive_publication_test.cpp | 21 | #include <gtest/gtest.h> | COMMENT |
| LOW | …client/src/test/c/aeron_exclusive_publication_test.cpp | 501 | const aeron_mapped_buffer_t *term_buffer = &m_publication->log_buffer->mapped_raw_log.term_buffers[partition_index]; | COMMENT |
| LOW | …client/src/test/c/aeron_exclusive_publication_test.cpp | 781 | // m_publication, | COMMENT |
| LOW | aeron-client/src/test/c/aeron_subscription_test.cpp | 21 | #include <gtest/gtest.h> | COMMENT |
| LOW | aeron-client/src/test/c/aeron_publication_test.cpp | 21 | #include <gtest/gtest.h> | COMMENT |
| LOW | aeron-client/src/test/c/util/aeron_fileutil_test.cpp | 21 | COMMENT | |
| LOW | …n-client/src/test/cpp_wrapper/MultiDestinationTest.cpp | 21 | #include <gmock/gmock.h> | COMMENT |
| LOW | …t/cpp_wrapper/ControlledFragmentAssemblerTestFixture.h | 1 | // | COMMENT |
| LOW | aeron-client/src/test/cpp_wrapper/CMakeLists.txt | 1 | # | COMMENT |
| LOW | …ient/src/test/cpp_wrapper/MultiDestinationByIdTest.cpp | 21 | #include <gmock/gmock.h> | COMMENT |
| LOW | …_wrapper/ImageControlledFragmentAssemblerTestFixture.h | 1 | // | COMMENT |
| LOW | …nt/src/test/cpp_wrapper/FragmentAssemblerTestFixture.h | 1 | // | COMMENT |
| LOW | …c/test/cpp_wrapper/ImageFragmentAssemblerTestFixture.h | 1 | // | COMMENT |
| LOW | aeron-client/src/test/cpp_wrapper/EmbeddedMediaDriver.h | 21 | #ifndef _BSD_SOURCE | COMMENT |
| LOW | aeron-client/src/main/c/CMakeLists.txt | 1 | # Copyright 2014-2025 Real Logic Limited. | COMMENT |
| LOW | aeron-client/src/main/c/aeron_archive_client_error.h | 1 | // | COMMENT |
| LOW | aeron-client/src/main/c/aeron_archive_client_error.h | 21 | #define AERON_ARCHIVE_ERROR_CODE_UNKNOWN_REPLICATION (212) | COMMENT |
| LOW | aeron-client/src/main/c/aeronc.h | 21 | extern "C" | COMMENT |
| LOW | aeron-client/src/main/c/aeronc.h | 881 | #define AERON_COUNTER_TYPE_ID_OFFSET offsetof(aeron_counter_metadata_descriptor_t, type_id) | COMMENT |
| LOW | aeron-client/src/main/c/aeron_client_error.h | 1 | // | COMMENT |
| LOW | aeron-client/src/main/c/aeron_client_error.h | 21 | #define AERON_ERROR_CODE_GENERIC_ERROR (11) | COMMENT |
| LOW | aeron-client/src/main/c/aeron_counters.h | 21 | #define AERON_SYSTEM_COUNTER_ID_BYTES_SENT (0) | COMMENT |
| LOW | aeron-client/src/main/c/aeron_counters.h | 41 | #define AERON_SYSTEM_COUNTER_ID_UNBLOCKED_COMMANDS (20) | COMMENT |
| LOW | aeron-client/src/main/c/aeron_counters.h | 61 | #define AERON_SYSTEM_COUNTER_ID_PUBLICATIONS_REVOKED (40) | COMMENT |
| LOW | aeron-client/src/main/c/aeron_counters.h | 81 | #define AERON_COUNTER_SUBSCRIPTION_POSITION_TYPE_ID (4) | COMMENT |
| LOW | aeron-client/src/main/c/aeron_counters.h | 101 | #define AERON_COUNTER_PUBLISHER_POSITION_NAME_EXCLUSIVE "pub-pos (exclusive)" | COMMENT |
| LOW | aeron-client/src/main/c/aeron_counters.h | 121 | #define AERON_COUNTER_SENDER_NAKS_RECEIVED_TYPE_ID (19) | COMMENT |
| LOW | aeron-client/src/main/c/aeron_counters.h | 141 | #define AERON_COUNTER_VMA_RX_ZERO_COPY_BYTES_TYPE_ID (62) | COMMENT |
| LOW | aeron-client/src/main/c/aeron_counters.h | 161 | #define AERON_COUNTER_DPDK_BYTES_TYPE_ID (83) | COMMENT |
| LOW | aeron-client/src/main/c/aeron_counters.h | 301 | #define AERON_COUNTER_SELECTOR_CLIENTS_COUNTER_TYPE_ID (300) | COMMENT |
| LOW | aeron-client/src/main/c/aeron_agent.c | 21 | COMMENT | |
| LOW | aeron-client/src/main/c/aeron_socket.h | 21 | #include "util/aeron_platform.h" | COMMENT |
| LOW | aeron-client/src/main/c/aeronc.c | 21 | #include <bsd/stdlib.h> | COMMENT |
| LOW | aeron-client/src/main/c/aeron_alloc.c | 21 | #include <bsd/stdlib.h> | COMMENT |
| LOW | aeron-client/src/main/c/aeron_context.c | 21 | #include <inttypes.h> | COMMENT |
| LOW | aeron-client/src/main/c/util/aeron_error.c | 21 | #include <stdlib.h> | COMMENT |
| LOW | aeron-client/src/main/c/util/aeron_strutil.c | 201 | COMMENT | |
| LOW | aeron-client/src/main/c/util/aeron_bitutil.c | 21 | #include <bsd/stdlib.h> | COMMENT |
| LOW | aeron-client/src/main/c/util/aeron_fileutil.h | 61 | void *aeron_open_file_append(const char *path); | COMMENT |
| LOW | aeron-client/src/main/c/util/aeron_netutil.c | 21 | COMMENT | |
| LOW | aeron-client/src/main/c/util/aeron_bitutil.h | 21 | #include <stdint.h> | COMMENT |
| LOW | aeron-client/src/main/c/util/aeron_platform.h | 21 | * Also, error out here if on a platform that is not supported. | COMMENT |
| LOW | aeron-client/src/main/c/util/aeron_platform.h | 41 | #endif | COMMENT |
| LOW | aeron-client/src/main/c/util/aeron_platform.h | 61 | #if defined(__cplusplus) | COMMENT |
| LOW | aeron-client/src/main/c/util/aeron_strutil.h | 21 | #include <stddef.h> | COMMENT |
| LOW | aeron-client/src/main/c/util/aeron_fileutil.c | 21 | COMMENT | |
| LOW | aeron-client/src/main/c/util/aeron_fileutil.c | 41 | #else | COMMENT |
| LOW | aeron-client/src/main/c/util/aeron_fileutil.c | 141 | ULONG CreateOptions, | COMMENT |
| LOW | aeron-client/src/main/c/util/aeron_fileutil.c | 161 | COMMENT | |
| LOW | aeron-client/src/main/c/util/aeron_clock.c | 21 | COMMENT | |
| LOW | aeron-client/src/main/c/protocol/aeron_udp_protocol.h | 161 | int32_t session_id; | COMMENT |
| LOW | aeron-client/src/main/c/protocol/aeron_udp_protocol.h | 181 | #define AERON_HDR_TYPE_ATS_SETUP (INT16_C(0x09)) | COMMENT |
| LOW | aeron-client/src/main/c/protocol/aeron_udp_protocol.h | 201 | COMMENT | |
| LOW | aeron-client/src/main/c/concurrent/aeron_thread.c | 21 | COMMENT | |
| LOW | aeron-client/src/main/c/concurrent/aeron_thread.c | 661 | #else | COMMENT |
| 108 more matches not shown… | ||||
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| MEDIUM | …c/main/java/io/aeron/test/driver/CTestMediaDriver.java | 573 | final int exitSignal = (0x7F & exitCode); // Essentially the same on Linux and macOS. | CODE |
| MEDIUM | …-driver/src/main/c/media/aeron_udp_channel_transport.c | 91 | // The kernel does both falling back when required. Essentially we just need a non-zero value for normal UDP. | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | aeron-client/src/main/c/aeronc.h | 1756 | typedef aeron_controlled_fragment_handler_action_t (*aeron_controlled_fragment_handler_t)( | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | aeron-system-tests/scripts/provisioning/fabfile.py | 3 | CODE |