[NETBEANS-6001] Yaml parser eats memory up to 100% in case of syntax errors

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 12.4
• Component/s: yaml - Editor

Environment

Netbeans 12.4

Java jdk-16.0.1+9 from AdoptOpenJDK

Ubuntu 20.04

Both Netbeans and the JDK installed from their respective websites, not the Ubuntu packet manager

 

 

• Assignee: Laszlo Kishalmi
• Reporter: Guntram Blohm
• Created: 14/Sep/21 07:23
• Updated: 09/Oct/21 01:08
• Resolved: 09/Oct/21 01:08

Description

When editing a YAML file, if there is a syntax error, netbeans eats up memory until it reaches 100% of what it's assigned, at which point garbage collection will use all CPU resources and netbeans becomes unresponsive.

To reproduce:

Create a new empty YAML file in any project

Enter the following text into the file:

some key:
     some value: "this is the value"

 

At this point, watch the widget that shows Netbeans' memory consumption, it increases rapidly, until it reaches 100%. At this point, Java spends 99% of its time in garbage collection, Netbeans becomes unresponsive (and if the Java parameters permit using all cores, the system becomes sluggish as well).

 

Closing/correcting the yaml file at that point doesn't help. This does/did not happen in Netbeans 12.3.

 

I attached JProfiler to the JVM that was running netbeans and could confirm the memory usage increase starting right after entering the invalid yaml. Taking a heap dump showed 56 million instances of `org.netbeans.modules.csl.spi.DefaultError`, as well as 56 million `java.lang.String`s.

 

 

 

Issue Links

• duplicates: NETBEANS-6086 Memory Leak in the YAML Parser