qunarcorp/bistoury

Features

• Live Instrumentation - Performs dynamic instrumentation and real-time debugging on active production environments without requiring process restarts.
• Java Diagnostic Toolkits - Provides a comprehensive suite for real-time troubleshooting of live Java applications through dynamic instrumentation and state inspection.
• Java Application Profilers - Identifies CPU bottlenecks and hot methods in running Java applications using flame graphs and asynchronous stack trace analysis.
• System State Snapshotting - Captures point-in-time snapshots of local variables and call stacks at specific code lines without pausing the system.
• Non-pausing State Capture - Snapshots local variables and call stacks at breakpoints without pausing the execution of the active application.
• CPU Profilers - Measures and visualizes CPU usage and execution time through asynchronous stack traces to find processing bottlenecks.
• Application-to-Host Registries - Maintains mappings between logical application names, physical servers, and process IDs for distributed discovery.
• Diagnostic Agent Management - Coordinates the mapping of applications to physical hosts and manages the lifecycle of remote diagnostic agents.
• Dynamic Instrumentation Debugging - Inspects variable values and captures runtime state in active environments using dynamic instrumentation.
• Proxy Routing - Routes diagnostic requests from a central console through a secure proxy layer to remote target agents.
• Dynamic Class Redefinition - Redefines loaded classes in memory at runtime to modify application behavior without process restarts.
• Bytecode Modification Frameworks - Compiles files in memory and redefines loaded classes using external bytecode to modify behavior without restarts.
• Conditional Variable Captures - Triggers state captures of local variables and call stacks only when specific logical expressions evaluate to true.
• Runtime Bytecode Instrumentation - Injects modified class data into a running JVM to monitor execution and capture state dynamically.
• Java Bytecode Manipulation - Enables the modification of loaded Java classes and redefinition of bytecode in memory without requiring process restarts.
• Production Diagnostics - Troubleshoots live production environments using a unified interface for system state monitoring and thread analysis.
• Application Performance Monitoring - Tracks runtime system metrics and identifies resource bottlenecks in live Java applications.
• Diagnostic Web Consoles - Provides a browser interface for diagnostics and logs to avoid direct server shell access.
• Java Heap Snapshot Capturers - Captures heap dumps from running Java processes to identify memory leaks and analyze object allocations.
• Remote Command Execution - Sends troubleshooting commands to target applications via a proxy and agent for real-time results.
• Application State Inspection - Examines running application state and variable values using decompiled code or linked source repositories.
• System Performance Profiling - Captures periodic snapshots of thread call stacks to identify CPU bottlenecks and generate flame graphs.
• Method Performance Profiling - Identifies hot methods and generates flame graphs to analyze execution time and optimize application speed.
• Distributed File Managers - Enables searching and reading files or compressed logs across multiple remote machines via a unified interface.
• Application Configuration Inspection - Retrieves and updates system properties, environment variables, and diagnostic parameters of a running application.
• Debugging Consoles - Provides a web-based console for real-time inspection of heap dumps, thread stacks, and variables across multiple server instances.
• Non-disruptive Monitoring - Adds observability probes to specific methods in a running application without interrupting execution.
• Diagnostic Source Integration - Integrates diagnostic tools with version control systems to display original source code during live analysis.
• Runtime Analysis - Collects operational data, system properties, and machine metrics to analyze the overall health of the JVM.
• Java Bytecode Decompilers - Converts compiled Java class files back into human-readable source code when original files are unavailable.
• Bytecode-to-Source Mapping - Links runtime bytecode execution steps to the original source code lines for real-time debugging.
• Version Control Integration - Links runtime bytecode to specific Git or Maven version hashes to retrieve the original source code.
• Thread Dumps - Generates snapshots of active JVM threads to diagnose deadlocks and concurrency issues.
• Thread Inspection - Inspects thread stacks and analyzes state to resolve lock contention and concurrency issues.
• Class Metadata Inspection - Analyzes loaded classes and their methods within a running process to diagnose runtime issues.
• Classloader Hierarchy Analysis - Visualizes classloader hierarchies and method signatures by analyzing classes loaded in the runtime environment.
• Remote Access Proxies - Routes diagnostic commands from a central console to target servers through a secure proxy isolation layer.
• Call Stack Samplers - Provides periodic call stack snapshots to build statistical CPU profiles and generate flame graphs.
• JMX Bean Inspections - Queries Java Management Extensions MBeans to retrieve and analyze internal runtime state and configuration.
• Log Analysis - Provides tools to search and analyze application logs across multiple remote machines using tail and grep operations.
• Method Call Chain Analysis - Maps the internal call path of methods and calculates the time spent at each node in the chain.
• Method Performance Metrics - Captures quantitative execution data including method call counts, exception rates, and response times.
• Thread Performance Analyzers - Identifies CPU-intensive threads and retains historical call stacks for performance analysis.
• Remote Log Management - Provides a command-line interface to view and download logs from production environments.
• Method Execution Tracking - Monitors the invocation sequence, input parameters, and return values of methods during runtime.
• System Health Dashboards - Displays real-time request rates, response times, and thread pool status on a centralized health dashboard.
• Unified Log Management - Provides a unified interface for searching and retrieving application logs across multiple remote servers.
• Call Argument History - Records and stores the history of method input parameters and return values for retrospective analysis.

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