Debugging ClassLoader leaks - Apache Flink - Apache

Debugging ClassLoader leaks - Apache Flink - Apache

Apache Flink: Monitoring Apache Flink Applications 101

Feb 25, 2019 · Monitoring Apache Flink Applications 101. 25 Feb 2019 Konstantin Knauf ( @snntrable) This blog post provides an introduction to Apache Flink's built-in monitoring and metrics system, that allows developers to effectively monitor their Flink jobs. Oftentimes, the task of picking the relevant metrics to monitor a Flink application can be

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[FLINK-11205] Task Manager Metaspace Memory Leak - ASF JIRA

When starting a YARN session, the JobManagers and TaskManagers are started with the Flink framework classes in the classpath. The classes from all jobs that are submitted against the session are loaded dynamically. The above is not entirely true specially when you set -yD classloader.resolve-order=parent-first.

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[jira] [Updated] (FLINK-25023) ClassLoader leak on JM/TM

Dec 31, 2021 · In this specific scenario, however, the created > threads may contain references to the context class loader (I did not see > that though) or, as happened here, it may inherit thread contexts such as the > {{ProtectionDomain}} (from an {{{}AccessController{}}}). > Hence user contexts and user class loaders are leaked into long-running > threads

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[FLINK-16245] Use a delegating classloader as the user

As reported in FLINK-11205, a reference to the user-code ClassLoader can be held by some libraries, causing class leaks. One way to circumvent this class leak is if the ClassLoader that we set as the user-code ClassLoader is a delegating ClassLoader to the real class loader, and when closing the user code ClassLoader we null out the reference.

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[jira] [Updated] (FLINK-25023) ClassLoader leak on JM/TM

Dec 31, 2021 · In this specific scenario, however, the created > threads may contain references to the context class loader (I did not see > that though) or, as happened here, it may inherit thread contexts such as the > {{ProtectionDomain}} (from an {{{}AccessController{}}}). > Hence user contexts and user class loaders are leaked into long-running > threads

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Flink setup for development (and some IntelliJ Idea cool

Jan 30, 2021 · 30 January 2021. Introduction. Apache Flink is an open-source, unified stream-processing and batch-processing framework. As any of those framework, start to work with it can be a challenge. Even if there is a good Getting Started or a great (and free) Hands-on Training, there are always questions about how to start, how to debug problems or how to launch the …

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ClassNotFoundException: org.apache.flink.streaming.api

Oct 14, 2016 · I am using the latest Flink-1.1.2-Hadoop-27 and flink-connector-kafka-0.10.2-hadoop1 jars. Flink consumer is as below: StreamExecutionEnvironment env=StreamExecutionEnvironment.

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Apache Flink: Release 1.2.0 – Changelog

- Remove obsolete classloader from CheckpointCoordinator - Move Table API to org.apache.flink.table - TaskManager should commit suicide after cancellation failure - Implement an archived version of the execution graph

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[email protected], past month - Apache Mail Archives

[email protected], past month: Showing 1 through 10 of 134 topics Archives (2014 - 2022): 2022. Jan 1. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec. 2021. Jan 777. Feb 665. Mar 888. Apr 718. May 688. Jun 668. Jul 469. Aug , I'd like to debug something that happens inside the scala-bridge package. However, when trying to browse

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[FLINK-19259] Use classloader release - issues.apache.org

Sep 16, 2020 · Description. FLINK-17554 introduced hooks for clearing references before unloading a classloader. The Kinesis Producer library is currently preventing the usercode classloader from being unloaded because it keeps references around. This ticket is to use the hooks with the Kinesis producer. Attachments.

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What's New in Apache Pulsar 2.7.2 - StreamNative

May 24, 2021 · Prevent class loader leak and restore offloader directory override. PR-9878. Previously, there was a class loader leak. This PR updates the PulsarService and the PulsarConnectorCache classes to use a map from directory strings to offloaders. Add logs for cleanup of offloaded data operation. PR-9852

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ClassLoaderLogManager (Apache Tomcat 7.0.109 API

Per classloader LogManager implementation. For light debugging, set the system property org.apache.juli.ClassLoaderLogManager.debug=true.Short configuration information will …

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Flink connector thrown Trying to access closed classloader

Dec 20, 2021 · Hi, i'm trying to test the unreleased Flink 1.13 connector on a Flink 1.13.1 cluster running on k8s. The task is simple like INSERT OVERWRITE a SELECT * FROM b. When i submit a task for the first time, it's ok. But when i submit the task

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[FLINK-21914] Trying to access closed classloader - ASF JIRA

Exception in thread " Thread-9" java.lang.IllegalStateException: Trying to access closed classloader. Please check if you store classloaders directly or indirectly in static fields. If the stacktrace suggests that the leak occurs in a third party library and cannot be fixed immediately, you can disable this check with the configuration 'classloader.check-leaked-classloader'.

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Remote Debugging of Flink Clusters - Apache Flink - Apache

May 19, 2016 · From time to time debugging a live Flink cluster may be a good choice to understand an issue, or simply to get a go line by line and get a better feeling of how a running Flink system works. To do so, the Java platform allows developer to attach a debugger to a running JVM. Passing the remote debugging JVM options

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flink/ClientUtils.java at master · apache/flink · GitHub

The ASF licenses this file. * with the License. You may obtain a copy of the License at. * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * limitations under the License. /** Utility functions for Flink client. */. * This method blocks until the job status is not INITIALIZING anymore.

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Apache Flink 1.9 Documentation: Debugging Classloading

When running Flink applications, the JVM will load various classes over time. These classes can be divided into three groups based on their origin: The Java Classpath: This is Java's common classpath, and it includes the JDK libraries, and all code in Flink's /lib folder (the classes of Apache Flink and some dependencies).

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Others Excavator - Evangel Industrial (Shanghai) Co., Ltd

China Others Excavator catalog of Hydraulic Breaker Hammer for Excavator 1.2tons to 120tons, Hyundai Brand New 6 Ton Mini Hydraulic Crawler Excavator (R60VS) provided by China manufacturer - Evangel Industrial (Shanghai) Co., Ltd., page1.

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Debugging Classloading | Apache Flink

One common reason is that a library is not compatible with Flink's inverted classloading approach. You can turn off inverted classloading to verify this (set classloader.resolve-order: parent-first in the Flink config) or exclude the library from inverted classloading (set classloader.parent-first-patterns-additional in the Flink config).

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Apache Flink: Apache Flink 1.14.0 Release Announcement

Sep 29, 2021 · Apache Flink 1.14.0 Release Announcement. 29 Sep 2021 Stephan Ewen (@StephanEwen) & Johannes Moser . The Apache Software Foundation recently released its annual report and Apache Flink once again made it on the list of the top 5 most active projects! This remarkable activity also shows in the new 1.14.0 release.

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