arthas-watch
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Arthas Watch Command: Observe Count Property On Return Or Exception
An engineer would use the 'arthas-watch' command in a production environment to monitor the return count or exception count of a specific method in a given class, helping to identify performance issues or error rates in real-time. Exact CLI syntax to observe count property on return or exception using Arthas Watch.
When to use this: An engineer would use the 'arthas-watch' command in a production environment to monitor the return count or exception count of a specific method in a given class, helping to identify performance issues or error rates in real-time.
Command Syntax
watch <class-pattern> <method-pattern> '{< params[1].count >}' -e -swatch <class-pattern> <method-pattern> "`{< params[1].count >`}" -e -sCommand Breakdown
-e- Command Option
- Tool-specific option used by this command invocation.
-s- Command Option
- Tool-specific option used by this command invocation.
FAQ
Purpose: Exact syntax to observe count property on return or exception using Arthas Watch.
Test path: Replace placeholders and run destructive commands in a disposable workspace first.
Flag behavior: Tool version, platform, and shell can change behavior.
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Related Operations
Arthas Watch Command: Observe Parameters And Return Value When First Is Five
watch <class-pattern> <method-pattern> '{< params[1],returnObj >}' '<"5".equals(params[0])>' -x 4 Arthas Watch Command: Observe First Parameter And Return Value watch <class-pattern> <method-pattern> '{< params[0],returnObj >}' -x 4 Arthas Watch Command: Observe First Parameter Return Value watch <class-pattern> <method-pattern> '{< params[0],returnObj >}' -x 4 Arthas Watch Command: Conditional Parameter Observation watch <class-pattern> <method-pattern> '{< params[1],returnObj >}' '<"5".equals(params[0])>' -x 4 Arthas Watch Command: Observe Second Parameter Count watch <class-pattern> <method-pattern> '{< params[1].count >}' -e -s