Class PoolBusyException

Namespace

CobaltPdf

Assembly

CobaltPdf.dll

Thrown by the render pool when MaxQueueDepth is set (> 0) and a render request arrives while every browser slot is in use and the bounded wait-queue is already full.

This is deliberate backpressure, not a failure: the work was never started, so it is always safe to retry. Hosts should translate it into a "server busy" response — HTTP 503 Service Unavailable with a Retry-After header — rather than a generic 500, so callers and load balancers know to back off and retry shortly instead of treating it as a hard error.

Never thrown when MaxQueueDepth is 0 (the default), which keeps the historical unbounded-queue behaviour.

public sealed class PoolBusyException : Exception, ISerializable

Inheritance

object

Exception

PoolBusyException

Implements

ISerializable

Inherited Members

Exception.GetBaseException()

Exception.GetType()

Exception.ToString()

Exception.Data

Exception.HelpLink

Exception.HResult

Exception.InnerException

Exception.Message

Exception.Source

Exception.StackTrace

Exception.TargetSite

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.ReferenceEquals(object, object)

Constructors

PoolBusyException(int, int)

Creates a new PoolBusyException describing the saturated pool.

public PoolBusyException(int maxSize, int maxQueueDepth)

Parameters

maxSize int

maxQueueDepth int

Properties

MaxQueueDepth

The configured maximum wait-queue depth that was exceeded.

public int MaxQueueDepth { get; }

Property Value

int

MaxSize

The pool's configured maximum concurrent render slots at the time of rejection.

public int MaxSize { get; }

Property Value

int