toolbox_server_error_telemetry_summary_09_03_2026.md

DevTools Toolbox Error Analysis - Server Protocol Errors

Period: 2026-02-27 09:20 to 2026-03-08 16:55 Total Errors: 152

Overview

The analysis reveals 152 server protocol errors, with the most common error type being 'undefined' (45.4%). 93.4% occur on aurora. Windows users account for 75.0% of all errors.

Platform Distribution

• Windows: 114 errors (75.0%)
• Darwin: 35 errors (23.0%)
• Linux: 3 errors (2.0%)

Channel Distribution

• aurora: 142 errors (93.4%)
• nightly: 5 errors (3.3%)
• beta: 5 errors (3.3%)

Error Breakdown by Category

1. TypeError: (undefined) - 39 errors (25.7%)

Error location:

_getDebugTargetData@resource://devtools/client/framework/toolbox.js:1486:17

Affected:

• Channels: aurora (34), nightly (3), beta (2)
• Platforms: Windows (38), Darwin (1)
• Targets: undefined (39)

2. SecurityError: Error: (watchResources) - 35 errors (23.0%)

Error location:

listen@resource://devtools/server/actors/webconsole/listeners/document-events.js:66:11

Affected:

• Channels: aurora (31), nightly (2), beta (2)
• Platforms: Windows (25), Darwin (8), Linux (2)
• Targets: server0.conn0.watcher3 (18), server0.conn2.watcher3 (6), server0.conn1.watcher3 (3)

3. Error: (undefined) - 27 errors (17.8%)

Error location:

getItemOnError@resource://devtools/shared/async-storage.js:100:13

Affected:

• Channels: aurora (27)
• Platforms: Windows (25), Darwin (2)
• Targets: undefined (27)

4. out of memory: Error: (watchTargets) - 21 errors (13.8%)

Error location:

onPacket/<@resource://devtools/shared/protocol/Front.js:404:31

Affected:

• Channels: aurora (21)
• Platforms: Windows (11), Darwin (10)
• Targets: server0.conn0.watcher3 (15), server0.conn2.watcher3 (2), server0.conn6.watcher3 (1)

5. InvalidStateError: Error: (watchTargets) - 11 errors (7.2%)

Error location:

onNewTargetActor@resource://devtools/server/connectors/js-process-actor/ContentProcessWatcherRegistry.sys.mjs:252:38

Affected:

• Channels: aurora (11)
• Platforms: Darwin (9), Windows (2)
• Targets: server0.conn0.watcher3 (11)

6. TypeError: Error: (watchResources) - 4 errors (2.6%)

Error location:

watch@resource://devtools/server/actors/resources/console-messages.js:93:7

Affected:

• Channels: aurora (4)
• Platforms: Windows (3), Darwin (1)
• Targets: server0.conn0.watcher3 (2), server0.conn12.watcher3 (1), server0.conn1.watcher3 (1)

7. SecurityError: Error: (watchResources) - 3 errors (2.0%)

Error location:

watch@resource://devtools/server/actors/resources/console-messages.js:93:7

Affected:

• Channels: aurora (3)
• Platforms: Darwin (2), Windows (1)
• Targets: server0.conn20.watcher3 (1), server0.conn1.watcher3 (1), server0.conn2.watcher3 (1)

8. out of memory: Error: (updateConfiguration) - 2 errors (1.3%)

Error location:

onPacket/<@resource://devtools/shared/protocol/Front.js:404:31

Affected:

• Channels: aurora (2)
• Platforms: Windows (1), Darwin (1)
• Targets: server0.conn8.target-configuration4 (1), server0.conn2.thread-configuration5 (1)

9. out of memory: Error: (watchResources) - 2 errors (1.3%)

Error location:

onPacket/<@resource://devtools/shared/protocol/Front.js:404:31

Affected:

• Channels: aurora (2)
• Platforms: Darwin (1), Windows (1)
• Targets: server0.conn0.watcher3 (2)

10. InternalError: Error: (watchTargets) - 2 errors (1.3%)

Error location:

isAbsoluteURI@resource://devtools/shared/loader/base-loader.sys.mjs:62:25

Affected:

• Channels: aurora (1), beta (1)
• Platforms: Windows (2)
• Targets: server0.conn0.watcher3 (2)

Top Error Types Summary

1. undefined: _getDebugTargetData - 39 occurrences (25.7%)
2. SecurityError: listen - 35 occurrences (23.0%)
3. undefined: getItemOnError - 27 occurrences (17.8%)
4. out of memory: onPacket/< - 21 occurrences (13.8%)
5. InvalidStateError: onNewTargetActor - 11 occurrences (7.2%)
6. TypeError: watch - 4 occurrences (2.6%)
7. SecurityError: watch - 3 occurrences (2.0%)
8. out of memory: onPacket/< - 2 occurrences (1.3%)
9. out of memory: onPacket/< - 2 occurrences (1.3%)
10. InternalError: isAbsoluteURI - 2 occurrences (1.3%)

Actionable Insights

• 1. undefined: _getDebugTargetData accounts for 25.7% of all errors (39 occurrences)
• 2. aurora channel dominance: 93.4% of errors are from aurora
• 3. Platform-specific: undefined: _getDebugTargetData is predominantly on Windows (38/39 errors)

Recommendations

Priority 1: undefined: _getDebugTargetData

• File location: devtools/client/framework/toolbox.js:1486:17
• Impact: 25.7% of all errors

Priority 2: SecurityError: listen

• File location: devtools/server/actors/webconsole/listeners/document-events.js:66:11
• Impact: 23.0% of all errors

Priority 3: undefined: getItemOnError

• File location: devtools/shared/async-storage.js:100:13
• Impact: 17.8% of all errors

Priority 4: out of memory: onPacket/<

• File location: devtools/shared/protocol/Front.js:404:31
• Impact: 13.8% of all errors

Priority 5: InvalidStateError: onNewTargetActor

• File location: devtools/server/connectors/js-process-actor/ContentProcessWatcherRegistry.sys.mjs:252:38
• Impact: 7.2% of all errors

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DevTools Toolbox Server Protocol Errors (7-day analysis)

152 errors recorded from 2026-02-27 09:20 to 2026-03-08 16:55. Top issues: undefined: _getDebugTargetData (39 errors), SecurityError: listen (35 errors), undefined: getItemOnError (27 errors). aurora channel represents 93.4% of errors. Windows accounts for 75.0% of errors.