Table of Contents: What is heap? What is the difference between heap memory and total memory? What is garbage collection? When is heap usage a concern? What are some common heap issues? How to fix common heap issues? Will increasing the…

Symptoms On an Appian 20.2 or 20.3 environment, functionality depending on the search server is negatively impacted. Symptoms are varied but include degraded performance, inability to upload documents, and/or issues deploying packages. To validate…

Table of Contents: Why is my heap profile different after upgrading to 20.1? What should I expect when looking at Cloud Insights? On a site configured with high availability (HA), why do the servers have different heap utilization profiles?…

Symptoms Tomcat fails to start when the app server heap parameters are defined in custom.properties . The following error is seen in the tomcat-stdOut.log : ========================================================================= YYYY-MM-DD HH…

Purpose After generating a Java heap dump , it is common for the corresponding leak suspects reports to contain clear suspects without associated stack traces to analyze. In these situations, it is often possible to find the relevant stack traces in…

Purpose The Appian Search Server may crash due to an OutOfMemoryError . An OutOfMemoryError indicates that the search server has run out of available heap space. The root cause for running out of heap space may vary. Default heap space for the Search…

Purpose Appian Technical Support might ask you to provide them with Java heap dumps to troubleshoot memory leaks, performance issues, etc. There are different ways of generating this file. This article describes the most common way of generating a heap…

Symptoms When utilizing functionality that requires the search server, the following error message is printed in the application server log: Caused by: org.elasticsearch.action.search.SearchPhaseExecutionException: Failed to execute phase [query]…