Get the latest version of the ARMS agent-Application Real-Time Monitoring Service(ARMS)-阿里云帮助中心

This topic describes the release notes for the Java agent of Application Real-Time Monitoring Service (ARMS) Application Monitoring.

View the agent version

Log on to the ARMS console.
In the left-side navigation pane, choose Application Monitoring > Agent Management. In the top navigation bar, select a region.
Click the Agent Release Notes tab to view all official agent versions released after September 2021.
ARMS provides download links for agent packages that are within their support period. When you manually install an ARMS agent, select the latest agent version.
Note
- Each official agent version has a fixed support period of 6 months from its release date.
- Starting with version 4.x, the agent is also available in Long-Term Support (LTS) versions. When you manually install an ARMS agent, we recommend prioritizing the LTS version. An LTS version has a fixed support period of 12 months.

Agent version

Version 5.x

ARMS 5.x fully adopts the OpenTelemetry (OTel) semantic conventions. Through a series of extension mechanisms, it is decoupled from the OpenTelemetry Java Agent and will continue to evolve with OTel semantic standards and the surrounding ecosystem. This allows users to benefit from the latest community semantic capabilities, avoid vendor lock-in, and access a range of advanced observability features exclusive to Alibaba Cloud. For more information, see [Product Change] Breaking changes in Java agent 5.x.

Version	Release date	Expiration date	Release notes
5.1.0	May 29, 2026	November 29, 2026	Added the business trace analysis feature. For more information, see business trace analysis. business parameter extraction now supports more matching logic. For more information, see Business parameter extraction rules. Added support for AgentScope, Agent-to-Agent (A2A), Model Context Protocol (MCP), and the Spring AI Alibaba 1.1 framework to improve observability coverage for AI applications. Added support for the SofaRPC framework.
5.0.1	March 1, 2026	September 1, 2026	Fixed an issue where the trace compression feature could cause concurrency exceptions in high-concurrency scenarios. Added try-catch protection to some enhancements based on native framework extensions to protect your application from potential exceptions.
5.0.0	February 4, 2026	August 4, 2026	Built on OpenTelemetry Java Instrumentation version 2.23.0, including all of its core capabilities. Implemented based on OpenTelemetry Semantic Conventions 1.37.0. All trace-related content, such as span names, attributes, events, and exceptions, complies with this version of the semantic standard. For more information, see the related semantic conventions documentation. Natively supports the rich extension points of OpenTelemetry Java Instrumentation. This includes support for custom plugins and operations such as adding attributes and context to existing plugins. For more information, see the documentation. Significantly optimized the agent package, reducing its size by more than 15 MB compared with version 4.7.0. This reduces the overall agent loading time during application startup. Optimized the continuous profiling engine and added crash protection to prevent application crashes caused by specific JDK versions. Fixed an issue in version 4.x where spans failed to be collected in specific Spring WebMVC versions. If earlier versions did not record these spans, your data volume may increase slightly. Fixed an issue in version 4.x where exceptions were not recorded during the execution of ElasticJob scheduled tasks. Important This release is a major upgrade from version 4.x and includes some breaking changes. For more information, see [Product Change] Breaking changes in Java agent 5.x.

Version 4.x

ARMS agents of version 4.x and later are built on the OpenTelemetry Java Agent. They fully embrace open-source standards and provide all the features of earlier agent versions, with some minor adjustments. In the same scenario, version 4.x agents report more data than version 3.x agents. For more information, see [Agent Upgrade] Announcement on upgrading to ARMS Application Monitoring agent 4.x.

For information about the performance of version 4.x agents, see Performance stress testing report for Java agent 4.x.

Version	Release date	Expiration date	Release notes
4.8.1	June 8, 2026	June 8, 2027	Fixed an issue where the convergence logic caused high CPU usage in divergence scenarios. Fixed a context leak in the ONS plugin in batch consumption scenarios. Fixed an issue where deadlock reports from the agent did not include a stack trace.
4.8.0	March 22, 2026	September 22, 2027	Added support for Spring AI Alibaba 1.1.0.0. Added support for the agentscope agent plugin. Added support for reporting data over HTTPS. Added support for configuring trace context extraction and injection policies. Added support for capturing raw JDBC connection strings via the database call configuration to prevent data loss from connection string parsing failures. Fixed an issue where asynchronous calls could not trigger error and slow call sampling. Fixed an issue where RASP threw a ClassCircularityError exception in JDK 21 scenarios.
4.7.1	January 30, 2026	July 31, 2026	Fixed an agent startup failure caused by insufficient permissions for the workspace directory. Fixed a class-loading deadlock issue that occurred after RASP was enabled. Fixed an issue where EDAS applications were not compatible with the new configuration subscription mode. Fixed a null pointer exception in JDBC transaction operations.
4.7.0	December 22, 2025	June 22, 2026	Added support for JDK 25. Upgraded the Arthas version in Arthas Diagnostics to 4.1.0. Added support for disabling low-traffic sampling. Added support for filtering metrics of specific call types to prevent them from being reported. For more information, see Agent collection configuration. Added support for IP desensitization. Added support for placing specific Baggage into Span attributes. For more information, see Agent collection configuration. Migrated the ARMS application configuration push service from ACM to ConfigServer. Fixed an issue where low-traffic sampling did not work as expected when the spring-bean plugin was enabled. Fixed a rare issue where instrumentation for the OkHttp framework was not triggered. Fixed an issue where no data was reported for motan client calls in some scenarios.
4.6.3 (LTS)	December 15, 2025	December 15, 2026	Fixed an issue where a ClassCircularityError was occasionally thrown after the application security feature was enabled.
4.6.2	November 25, 2025	May 25, 2026	Fixed an issue of increased memory usage when many thread pools are created. Fixed a rare issue where the JVM would freeze when continuous profiling was enabled, caused by changes in agent versions 4.4.x and later. Fixed an issue of inaccurate exception metrics when the Spring Bean plugin was enabled. Fixed an issue where the asynchronous logger of the log4j framework failed to automatically associate TraceIDs. Fixed an issue where a ClassCircularityError was thrown in high-load scenarios.
4.6.1	November 6, 2025	May 6, 2026	Fixed an issue where context propagation with MySQL driver 8.4+ caused high network bandwidth usage. Fixed an issue where connection pool monitoring data for Jedis was empty when using Jedis client 4.0+. Fixed unexpected log printing when using Jetty HttpClient.
4.6.0	September 20, 2025	March 20, 2026	Added support for environments such as ea134, Shanghai spe, and Mexico. Added support for the JAX-RS and JAX-WS frameworks. Added support for the OpenAI SDK. Added support for the Spring AI framework. Added support for the Spring AI Alibaba framework. Fixed a potential performance issue with reflective calls. Fixed an issue where the number of active threads in Undertow was not as expected. Fixed an issue where ShardingSphere database connection strings were recorded abnormally. Fixed an issue where span duration statistics were abnormal in some scenarios. Fixed an issue where the maximum and minimum number of idle connections in the Jedis 3.x connection pool were inaccurate. Fixed an issue where context was not correctly passed in some RxJava scenarios. Fixed an issue where crash log reporting failed because the java command could not be found when the user application crashed.
4.5.2	September 11, 2025	March 11, 2026	Removed the gateway check logic from the SpringMVC plugin injection for MSE traffic protection.
4.4.2 (LTS)	September 9, 2025	September 9, 2026	Removed the gateway check logic from the SpringMVC plugin injection for MSE traffic protection.
4.5.1	August 13, 2025	February 13, 2026	Changed the default protocol for Tracing Analysis to the EagleEye protocol. Fixed an issue where many metrics were generated in MQTT consumption scenarios that use wildcard characters.
4.4.1	July 24, 2025	January 24, 2026	Fixed an issue where the user application read an incorrect git.properties file.
4.5.0	July 17, 2025	January 17, 2026	Added support for collecting custom metrics from the OpenTelemetry SDK. Added support for counting server-side HTTP methods. Added the `host.name` field to Span Resource. Changed the default protocol for Tracing Analysis to the W3C protocol. Fixed an issue where RabbitMQ client metrics were inaccurate when Receive Spans were recorded. Fixed an issue where reporting tasks would stack up due to poor network quality. Fixed an issue where the user application read an incorrect `git.properties` file. Fixed an issue with abnormal statistics for raw SQL statements. Optimized agent memory usage in scenarios where the application itself has memory leaks. Optimized resource usage for self-monitoring logs. Optimized the data collection performance of the Kafka Producer plugin.
4.4.0	June 6, 2025	December 6, 2025	Added support for the HBase framework. Added support for the MNS Client framework. Added support for the paho-client-mqttv3 framework. Added support for the JMS framework. Added support for the JavaHttpClient framework. Added labels for GC trigger reasons to JVM GC metrics. Fixed an issue where the number of idle connections in Druid was negative. Fixed an issue where instrumentation for Tomcat 10 was enabled but instrumentation for Tomcat 8 was not, because the user introduced Jakarta-related dependencies. Fixed an issue where the DestId and Endpoint values could not be obtained for some Dubbo 3.x versions. Fixed an issue where Redisson response sizes were calculated incorrectly. Changed continuous profiling to use static libraries by default to avoid conflicts with user dynamic libraries. Fixed an issue where SQL statements could not be obtained for Java Database Connectivity (JDBC) calls encapsulated by OpenTracing.
4.3.2	May 20, 2025	November 20, 2025	Added the business trace analysis feature. For more information, see Business trace analysis. Added more matching logic for business parameter extraction. For more information, see Business parameter extraction rules. Added support for the tomcat-dbcp and tomcat-jdbc frameworks for connection pool monitoring. For more information, see Supported frameworks for connection pool monitoring. Fixed an issue where the Tomcat thread pool was occasionally empty in thread pool monitoring. Fixed an issue where the trace_id in the user log MDC was overwritten by the log4j framework. Fixed an issue where data related to scheduled tasks was incorrectly filtered after disabling the collection of internal calls without an entry point. Fixed an issue where data for user database calls was occasionally missing due to a dependency on ShardingSphere. Fixed an issue where Baggage failed to be passed in some Dubbo versions. Fixed an issue where agent continuous profiling logs were printed to the user's standard output due to permission issues. Fixed an issue where queries failed after jumping to the MongoDB console. The agent now filters out ping commands in Lettuce by default. Disabled the collection of internal calls without an entry point by default.
4.2.5 (LTS)	April 10, 2025	April 10, 2026	Optimized performance when using the version 4.x agent with the ARMS software development kit (SDK). Optimized the performance of the Lettuce plugin when using regular expression matching. Fixed an issue where Redis command parameters recorded by the Lettuce plugin contained garbled text.
4.2.3	February 24, 2025	August 24, 2025	Fixed an issue where interface convergence was incorrectly triggered because the SDK failed to initialize in Service Mesh scenarios. Fixed an issue where calls failed in scenarios where Lettuce 5.1+ and React 3.5+ coexisted. Fixed an issue where Lettuce calls failed when the Collect internal calls without an entry point switch was turned off for Lettuce 5.1+. Fixed an issue where context leaks occasionally occurred when a downstream call made through Feign in Spring Cloud failed.
4.2.2	January 9, 2025	July 9, 2025	Added support for the Motan framework. Added support for filtering internal calls without an entry point. Fixed a rare null pointer issue when Memcached executes the bulkget instruction. Fixed an issue where the arms_file_desc_open_ratio metric was not collected. Fixed an issue where statistics for primary and secondary requests were incorrect for ShardingSphere 5.2.+. Fixed an issue where server-side calls were incorrectly identified as client-side calls in some Dubbo scenarios. Fixed an issue where some data was missing when a sub-switch was turned on because the agent was not fully initialized at application startup when the main switch was off. Fixed an issue where automatic filling of TraceId and SpanId failed in ReusableLogEvent scenarios. Optimized CPU overhead when users provide HTTP services through both SpringMVC and custom servlets.
4.1.13	December 10, 2024	June 10, 2025	Fixed a rare null pointer issue in Undertow scenarios. Fixed a deadlock issue in asynchronous context pass-through in JDK 21 virtual thread scenarios. Fixed an out-of-memory (OOM) issue caused by reading spring-actuator related metrics. Fixed a rare application startup failure caused by mounting the agent with other agents at the same time.
4.2.1	December 6, 2024	June 6, 2025	Added support for Lindorm databases. Added support for configuring blacklists based on thread pool usage scenarios and thread pool thread names. For more information, see Pooling monitoring configuration. Added support for using spring-bean public method instrumentation to collect data for the method stack of the original version 3.x agent. For more information, see Agent switch settings. Added support for the `MDC.get("EagleEye-TraceID")` usage, which is disabled by default. For more information, see Application log association configuration. Added support for configuring the trace collection switch. For more information, see Agent collection configuration. Enabled the hot spot feature for asynchronous scenarios by default. For more information, see Use hot spots to diagnose slow calls in Java applications. Added support for filtering RPC Server, MSMQ Consumer, scheduled tasks, and Spans. For more information, see Interface call configuration. Added support for monitoring GC-related metrics in ZGC generational scenarios. The business parameter extraction feature now supports extracting requests from apache-http-client and okhttp. For more information, see Extract business parameters. Optimized the CPU overhead of the dependency reporting feature. Disabled automatic asynchronous context pass-through by default due to a deadlock risk in JDK 21 virtual thread scenarios. Fixed a potential compatibility issue in multi-agent scenarios. Fixed an issue where the spanName of HttpUrlConnection was POST in some scenarios. Fixed a rare null pointer issue in Undertow scenarios. Fixed an issue where exceptions were not recorded in some gRPC framework scenarios. Fixed an issue where exceptions were not recorded in some Lettuce plugin scenarios. Fixed an issue where the agent version number was not recorded in version 4.x agent metrics. Fixed a rare connection failure after Arthas was enabled. Fixed an issue where interfaces such as POST, GET, /, and /* could not be filtered in the interface list. Fixed a startup issue caused by the agent repeatedly creating a tmpdir. Fixed an issue where GC metrics could not be correctly collected when Microservices Engine (MSE) Pro was also enabled. Fixed an issue where no metrics were generated in Kafka batch consumption scenarios.
4.1.12	October 10, 2024	April 10, 2025	Fixed an issue where upstream and downstream data for interfaces was incorrect in some scenarios. Fixed an issue where network-related metrics kept increasing. Fixed an issue where exception metrics were recorded multiple times. Fixed an issue where custom parameter extraction did not work in some scenarios. Added instrumentation for exception constructors to support recording all exceptions.
4.1.11	September 15, 2024	March 15, 2025	Adjusted the quantile calculation principle. For more information, see ARMS quantile metric calculation principle. Optimized agent CPU and memory overhead. Added an upper limit on the number of Spans that can be created in a single call. The current limit is 10,000. Added a policy selection for thread name pattern extraction in thread pool monitoring. The default value is `REPLACE_ALL_DIGITAL (replaces all numeric characters with )`. You can set it to `REPLACE_TAIL_DIGITAL (replaces trailing numeric characters with )`. Added metrics for collecting loaded and unloaded classes in the JVM. Added support for more flexible data collection configurations, such as quantiles and upstream/downstream data. Fixed an occasional crash issue caused by memory hot spots. Fixed an issue where traces containing hot spots could not be searched in some scenarios. Fixed an issue where Span reporting failed due to a null pointer in the ONS plugin. Fixed a Kafka initialization failure. Fixed an OOM issue caused by a MongoDB stream read failure. Fixed an issue where the ARMS_HOST_TAGS environment variable could not be correctly parsed. Fixed an issue where thread pool monitoring data reporting was interrupted. Fixed several security vulnerabilities.
4.1.9	July 10, 2024	January 10, 2025	Fixed an issue where the application name could not be modified by manually adding arms.AppName for SAE applications. Fixed an issue where repeated call Spans for Lettuce 5.1 were not compressed. Fixed an SQL statement parsing failure and an issue with reporting unrecognized database metrics. Fixed an issue where pooling monitoring had no data in some Jedis and Lettuce scenarios. Fixed an issue where agent metric reporting was abnormally aborted. Fixed a rare application startup failure caused by a ClassLoader enhancement failure. Added the http.status_code field to Spans. Changed the command for collecting CrashLog to the code editor.
4.1.8	June 29, 2024	December 29, 2024	Fixed an incompatibility issue between old SAE applications and the version 4.x agent.
4.1.7	June 26, 2024	December 26, 2024	Fixed an issue where the graceful startup and shutdown feature of Microservices Engine (MSE) was unavailable in some scenarios.
4.1.6	June 13, 2024	December 13, 2024	Added support for the JFinal and WebX frameworks. Added support for RocketMQ 4.x Pull consumption scenarios. Added support for automatically filling TraceId and SpanId in logs. Added support for configuring parent class exceptions in exception filtering. Added support for recording original status codes in HTTP metrics. Fixed an issue where some connection methods for OceanBase and PolarDB were not supported. Fixed an issue where WebSocket requests were identified as error requests. Fixed OOM issues in some asynchronous scenarios.
4.1.3	May 27, 2024	November 27, 2024	Fixed an HTTP 404 response code issue in scenarios where requests carried cookies in Tomcat 10.1.0 to Tomcat 10.1.6.
4.1.1	May 17, 2024	November 17, 2024	Fixed a rare deadlock issue in the version 4.1.0 agent. Fixed an issue where Jedis SQL was recorded incorrectly.
4.1.0	May 15, 2024	November 15, 2024	This version is rebuilt based on the OpenTelemetry Java Agent and fully embraces open-source standards, providing 100% coverage of the features of older agents. Added a custom parameter extraction feature. For more information, see Extract business parameters. Added support for PolarDB 2, Cassandra, OceanBase, Apache ShenYu, and Spring Schedule. Added automatic asynchronous context pass-through. You do not need to configure package names. Existing configurations are not affected. Added support for custom consumers in RabbitMQ and custom consumption methods in Kafka. No separate configuration is required. Added support for setting protocol pass-through priority for each application. Added monitoring for custom thread pools. Fixed an issue where system metrics were inaccurate in container scenarios.

Version 3.x

Note

All version 3.x agents have expired. Upgrade your agents to version 4.x as soon as possible.

Version	Release date	Release notes
3.2.10	July 11, 2024	Fixed an application startup failure in specific scenarios of the SpringCloudAlibaba Sentinel framework.
3.2.9	June 11, 2024	Disabled the collection of some JFR events to prevent a rare crash issue in JDK 8u282 and earlier versions.
3.2.8	May 6, 2024	Added thread pool monitoring for Undertow 2.x. The agent is no longer attached if the maximum JVM heap memory is less than 256 MB. Added support for PushConsume consumption scenarios in ONS 2.x. Fixed an issue where continuous profiling was not supported in some scenarios. Fixed an issue where method metrics were counted twice for instrumentation in asynchronous Servlet mode in Undertow. Fixed a conflict with the user's dependent Nacos 2.x version. Fixed a conflict with the user's dependent high-version Jackson. Fixed an issue where the /error interface filtering did not take effect. Fixed an issue where W3C protocol support was incomplete. Fixed an issue where WebSphere HTTP status codes were not recorded. Fixed an issue where some Jedis and Redisson usages were not supported. Fixed an issue where Tomcat 10 instrumentation did not take effect due to a dependency on the Servlet API.
3.1.4	January 4, 2024	Added support for JDK 21. Added a hot spot feature to continuous profiling for diagnosing slow traces. Optimized the agent data reporting logic to improve the reporting success rate. Optimized agent CPU and memory overhead to reduce the occupation of the old generation space by agent objects. Added support for Vert.x WebServer component 4.x and fixed issues where instrumentation for plugins such as xxl-job and OceanBase failed.

Version 2.x

Note

All version 2.x agents have expired. Upgrade your agents to version 4.x as soon as possible.

Version	Release date	Release notes
2.9.1.2	October 12, 2023	Added support for Spring 6.0/Spring Boot 3.0 components. Added support for PostgreSQL 42.3.2+ components. Added support for Vert.x versions from 3.3 to 3.9. Fixed an issue where monitoring metrics were missing when the RedisTemplate called the Jedis component. Fixed an issue where asynchronous context pass-through failed for traces in special Reactor usage scenarios. Fixed an issue where instrumentation was overwritten in special Kafka client usage scenarios.
2.9.0	July 13, 2023	Added default support for desensitizing sensitive key-value pairs in collected JVM system parameters, Kubernetes YAML files, and method input parameters. Added support for displaying metrics related to the ZGC garbage collector. Added support for counting only exceptions that are not caught by a user's try-catch block. Fixed issues such as the inability to obtain the host IP address. Optimized related instrumentation in reactor-netty to more accurately count the number of requests and response times.
2.8.3	March 31, 2023	The agent now supports components such as SequoiaDB, Informix, ElasticJob, OceanBase, and DB2. Added support for continuous profiling in regions outside China. The memory snapshot feature is fully upgraded to the Alibaba Cloud Application Diagnosis and Analysis Platform (ATP) solution. Added support for JDK 8, JDK 11, and JDK 17.
2.7.3.5	July 27, 2022	Version 2.7.3.5 supports JDK 11, JDK 8, and earlier versions. Version 2.7.3.5-jdk17 supports only JDK 17. Optimized probe performance. Fixed Lambda support issues and Lettuce plugin support issues in JDK 11 scenarios.
2.7.1.4	April 26, 2022	Added support for Bean instrumentation and future scenario trace passing for SpringMongoDB, ShardingJDBC, and Dubbo. Added support for Lettuce response size metrics. Enabled the RASP application security feature by default. Added support for one-click log collection by the agent, collection of process CPU usage, and features such as startup analysis, dependency information, and configuration information. Optimized the overall performance of the agent, improved the data reporting success rate, and fixed some known issues, including Spring security vulnerabilities, SQL dimension divergence, and inaccurate sample rates in the Basic Edition.
2.7.1.3	October 18, 2021	Added support for XXL-JOB, SchedulerX, Elasticsearch, and Vert.x. Added support for Arthas diagnostics, client-side custom sampling, application security attack prevention, and detection of vulnerable components. Added support for JDBC response size and Redis hit rate. Adjusted pooling monitoring and optimized support for some asynchronous scenarios.
2.7.1.2	September 17, 2021	Added support for plugins such as Kafka, RocketMQ, and Sofa. Added support for pooling monitoring, added more information to the trace display, added support for FC scenarios, and added support for URL convergence based on Spring annotations. Added support for end-to-end canary release for Dubbo and Spring Cloud, canary release for Spring Cloud Gateway, registration center migration for Nacos and Eureka, and the service degradation feature. Added support for zone affinity routing for Dubbo and Spring Cloud. Optimized startup time and memory usage. Fixed some bugs related to memory snapshots, thread profiling, data reporting, and the SDK. Fixed security vulnerabilities.
2.7.1.1	August 14, 2020	Added support for NoSQL monitoring. Added support for microservice tag-based routing. Added support for N+1 call compression. Fixed network connectivity issues for Alibaba Finance Cloud and optimized memory usage.
2.7.1	July 16, 2020	Added support for the new Jedis plugin to resolve the issue where Redis clusters were not recognized in the topology graph.
2.7.0	May 20, 2020	Added support for microservice sub-product features.
2.6.2	May 20, 2020	Added support for Business Monitoring.
2.6.1.2	March 19, 2020	Added support for microservice authentication. Added support for graceful shutdown of microservices.
2.6.1.1	March 16, 2020	Added support for components such as SpringCloud Gateway and Spring Webflux.
2.6.1	February 14, 2020	Added support for obtaining microservice metadata and related features.
2.6.0.2	January 2, 2020	Added support for new exception analysis. Fixed Thrift plugin issues.
2.6.0	December 17, 2019	Added support for asynchronous traces. Parameters for Dubbo/HSFProvider calls are now recorded. Fixed several issues with existing plugins.
2.5.9.5	November 28, 2019	Added support for the jfinal-undertow plugin. Fixed several bugs, including the issue where Dubbo thread profiling data could not be obtained.
2.5.9.3	November 25, 2019	Integrated ARMS with Managed Service for OpenTelemetry. Fixed several bugs and optimized performance.
2.5.9	September 6, 2019	Fixed a FastJson denial-of-service vulnerability. Modified the logic for obtaining the network interface card IP address.
2.5.8	August 2, 2019	Added support for binary state alerting, which lets you set alert rules for metrics that have only two states, such as yes/no or present/absent. Added support for the domestic Dameng database plugin.
2.5.7.2	July 30, 2019	Added support for JVM Metaspace metrics. Added support for customizing HTTP status codes to ignore. By default, status codes greater than 400 are counted as errors. You can customize which HTTP status codes greater than 400 are not counted as errors. [References]
2.5.7	July 11, 2019	Upgraded the dependent FastJson version that had security vulnerabilities.
2.5.6.1	June 28, 2019	Added support for Dubbo/MariaDB plugins. Added support for obtaining SQL binding values in custom configurations: Captures the variable values bound to PrepareStatement parameters. The change takes effect without restarting the application. [References] Optimized memory and fixed several bugs. Removed the Log4j log dependency to avoid conflicts.
2.5.6	June 7, 2019	Added support for quantile statistics. Optimized features and fixed several bugs.
2.5.5	June 3, 2019	Added support for HSF-HTTP calls. Optimized features and fixed several bugs.
2.5.3	March 15, 2019	Added support for reporting thread metrics during application runtime. Added support for the Spring-Data-Redis plugin. Added support for the Druid database connection pool plugin.
2.5.2	February 21, 2019	Added collection of the number of file handles. Added support for reporting instantaneous values of GC time and count. Added support for customizing the maximum length of request input parameters. [References]
2.5.1	January 14, 2019	Added support for trace compression. [References] Added a method to create application monitoring jobs without using the console. Optimized features and fixed several bugs.
2.5.0	December 28, 2018	Added support for one-click access without restarting the application. Improved host monitoring with support for Windows systems. Added support for Spring WebFlux. Optimized features and fixed several bugs.
2.4.6	October 26, 2018	Added support for gRPC, Thrift, and XMemcached plugins. Added support for displaying the interface call topology. Added support for displaying a topology that covers both frontend and backend.
2.4.5	September 17, 2018	Added support for the Lettuce plugin (JRE 1.8+). Added support for the MongoDB plugin. Collects detailed exception information.
2.4.4	August 6, 2018	Added support for reporting application thread profiling data. Added support for Memcached cache. Added support for custom configuration of exception filtering. [References]
2.4.3.1	June 29, 2018	Added support for WebLogic servers. Added support for Undertow servers. Optimized agent memory usage. Optimized agent startup loading time. Resolved an issue where JVM monitoring/host monitoring metrics might fail to be reported.
2.4.3	May 18, 2018	Added support for collecting monitoring metrics for the RocketMQ message queue. Added support for custom monitoring methods. Resolved an issue where logs were frequently output in rate-limiting scenarios. Added support for customizing the maximum length of the local method stack. [References] Optimized the sampling feature to not sample abnormal traces.
2.4.2	April 19, 2018	Added support for reading custom configuration information. Added support for obtaining trace information in real time using an SDK. Added support for collecting JVM metrics such as threads, GC count, and GC duration. Added support for HSF method-level call monitoring. Added support for collecting host monitoring metrics such as CPU, physical memory, network, and disk. Resolved an issue where stopping a process using ./shutdown.sh in a Tomcat environment might cause the process to get stuck.
2.4.1	March 24, 2018	Added support for JVM monitoring, such as reporting metrics for heap memory and non-heap memory. Added support for PlayFramework 1.4.4. Added support for custom configurations such as sample rate, agent switch, log level, and threshold parameters. [References]
2.4.0	February 14, 2018	Added support for PostgreSQL databases. Enabled private network communication between ECS instances in each Alibaba Cloud region and ARMS servers. Announced the commercial release of ARMS Application Monitoring.