[DIRMINA-1161] Accessing the session buffer of multiple decoders

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.0.22, 2.1.4
• Fix Version/s: 2.0.24, 2.2.2
• Component/s: Core
• Environment: Ubuntu 16.04.7 LTS ; Open JDK 11.0.10 ; Mina 2.0.22
• Assignee: Unassigned
• Reporter: Pavel Garin
• Created: 03/Feb/22 10:13
• Updated: 31/May/23 12:09

Description

As of Mina 2.0.17, the line of code in CumulativeProtocolDecoder 

 

private final AttributeKey BUFFER = new AttributeKey(getClass(), "buffer"); 

has been replaced with line 

private static final AttributeKey BUFFER = new AttributeKey(CumulativeProtocolDecoder.class, "buffer");

When using an architecture where multiple decoders inherited from CumulativeProtocolDecoder are used, the decoders corrupt each other's data. The key for the attribute in line 

IoBuffer buf = (IoBuffer) session.getAttribute(BUFFER);

has become the same for all decoders.