---
updatedAt: 2026-04-20T19:25:38.000Z
agentTools:
  siteIndex: https://techdocs.akamai.com/llms.txt
  projectIndex: https://techdocs.akamai.com/alerts-app/llms.txt
---

# Object Caching - 415: HTML Content Denied

This alert notifies you that the percentage of connections with the HTTP 415 error code exceeded a set threshold. It means that the request failed due to the unsupported `.txt` or `.html` content.

You can set this alert to monitor multiple CP codes.

# Available for

* Object Delivery

# Notification time

* **New Alert** - The condition is present for two to three minutes.
* **Alert Cleared** - The condition is cleared for three to four minutes.

# Threshold configuration

You need to set the percentage of failed origin connections necessary to trigger the alert. You must also select whether the alert should be triggered when the threshold is reached for one of the selected CP codes or all of them combined.

# Troubleshooting

Follow the instructions from the **Troubleshooting** section on the alert's page.

# Sibling pages

* [24x7 Stream Ingest Stopped](https://techdocs.akamai.com/alerts-app/docs/24x7-stream-ingest-stopped.md)
* [24x7 Stream Stale playlist detected](https://techdocs.akamai.com/alerts-app/docs/24x7-stream-stale-playlist-detected.md)
* [Adaptive](https://techdocs.akamai.com/alerts-app/docs/adaptive.md)
* [All Customer Servers for Property Down](https://techdocs.akamai.com/alerts-app/docs/customer-servers-prop-down.md)
* [API Gateway throttling limit alert](https://techdocs.akamai.com/alerts-app/docs/api-gateway-throttling-limit-alert.md)
* [Authorities for DNSSEC Zone do not point to Akamai](https://techdocs.akamai.com/alerts-app/docs/authorities-dnssec-zone-point-akamai.md)
* [Authorities incompatible with Sign\&Serve DNSSEC](https://techdocs.akamai.com/alerts-app/docs/authorities-incompatible-sign-serve-dnssec.md)
* [Average Latency for a specific stream bitrate](https://techdocs.akamai.com/alerts-app/docs/average-latency-specific-stream-bitrate.md)
* [Average Latency for a Stream](https://techdocs.akamai.com/alerts-app/docs/average-latency-stream.md)
* [BGP Down](https://techdocs.akamai.com/alerts-app/docs/bgp-down.md)
* [Bitrate deviation for a specific stream bitrate](https://techdocs.akamai.com/alerts-app/docs/bitrate-deviation-specific-stream-bitrate.md)
* [BOCC: High Error Rate (Multicaster-SMM) (StreamId)](https://techdocs.akamai.com/alerts-app/docs/bocc-high-err-rate-multicaster-smm-streamid.md)
* [Certificate's domain is blocked](https://techdocs.akamai.com/alerts-app/docs/cert-domain-blocked.md)
* [Control Center Event](https://techdocs.akamai.com/alerts-app/docs/cc-event.md)
* [Customer Datacenter Down](https://techdocs.akamai.com/alerts-app/docs/customer-datacenter-down.md)
* [Customer Server IP in Multiple Regions](https://techdocs.akamai.com/alerts-app/docs/customer-server-ip-multiple-regions.md)
* [Customer Server Removed from Rotation](https://techdocs.akamai.com/alerts-app/docs/customer-server-rmd-rotation.md)
* [DataStream - Upload Failures](https://techdocs.akamai.com/alerts-app/docs/datastream-upload-failures.md)
* [Directory containing too many files and subdirectories](https://techdocs.akamai.com/alerts-app/docs/dir-containing-many-files-sdirs.md)
* [DNS does not contain an authorized certificate authority](https://techdocs.akamai.com/alerts-app/docs/dns-not-authorized-cert-authority.md)
* [Domain validation failed](https://techdocs.akamai.com/alerts-app/docs/domain-validation-failed.md)
* [Download Time](https://techdocs.akamai.com/alerts-app/docs/dl-time.md)
* [DS record points to old DNSKEY record](https://techdocs.akamai.com/alerts-app/docs/ds-record-points-old-dnskey-record.md)
* [DS record points to wrong DNSKEY record](https://techdocs.akamai.com/alerts-app/docs/ds-record-points-wrong-dnskey-record.md)
* [Dynamic Flash (Ingest) Stream is Unavailable](https://techdocs.akamai.com/alerts-app/docs/dynamic-flash-ingest-stream-unavailable.md)
* [Edge Errors -- Content Delivery (HTTP 4xx and 5xx errors)](https://techdocs.akamai.com/alerts-app/docs/edge-err-content-deliv-http-4xx-5xx-err.md)
* [Edge Errors -- HLS](https://techdocs.akamai.com/alerts-app/docs/edge-err-hls.md)
* [Edge High MB Delivered](https://techdocs.akamai.com/alerts-app/docs/edge-high-mb-delivered.md)
* [Edge HTTP Status Code Errors -- Content Delivery](https://techdocs.akamai.com/alerts-app/docs/edge-http-status-code-err-content-deliv.md)
* [Edge HTTP Status Code Errors -- HLS](https://techdocs.akamai.com/alerts-app/docs/edge-http-status-code-err-hls.md)
* [Expired Default certificate](https://techdocs.akamai.com/alerts-app/docs/expired-default-certificate.md)
* [Expired Default certificate removal](https://techdocs.akamai.com/alerts-app/docs/expired-default-certificate-removal.md)
* [Failed Zonetransfer (Critical)](https://techdocs.akamai.com/alerts-app/docs/fail-zonetransfer-critical.md)
* [High Concurrent Connections](https://techdocs.akamai.com/alerts-app/docs/high-concurrent-connections.md)
* [High Concurrent Sessions](https://techdocs.akamai.com/alerts-app/docs/high-concurrent-sessions.md)
* [High Concurrent Streams - FLASH](https://techdocs.akamai.com/alerts-app/docs/high-concurrent-streams-flash.md)
* [High Disk Usage - NetStorage](https://techdocs.akamai.com/alerts-app/docs/high-disk-usage-ns.md)
* [High Edge Hits](https://techdocs.akamai.com/alerts-app/docs/high-edge-hits.md)
* [High Edge Hits -- Content Delivery](https://techdocs.akamai.com/alerts-app/docs/high-edge-hits-content-deliv.md)
* [High number of NXDOMAIN responses](https://techdocs.akamai.com/alerts-app/docs/high-number-nxdomain-responses.md)
* [High Origin Hits](https://techdocs.akamai.com/alerts-app/docs/high-origin-hits.md)
* [High Page View Usage](https://techdocs.akamai.com/alerts-app/docs/high-page-view-usage.md)
* [High Storage Read Operations](https://techdocs.akamai.com/alerts-app/docs/high-storage-read-op.md)
* [High Storage Write Operations](https://techdocs.akamai.com/alerts-app/docs/high-storage-write-op.md)
* [High Streaming Traffic - FLASH](https://techdocs.akamai.com/alerts-app/docs/high-streaming-traffic-flash.md)
* [High Traffic - DNS](https://techdocs.akamai.com/alerts-app/docs/high-traffic-dns.md)
* [High Traffic -- Content Delivery](https://techdocs.akamai.com/alerts-app/docs/high-traffic-content-deliv.md)
* [High Traffic -- HLS](https://techdocs.akamai.com/alerts-app/docs/high-traffic-hls.md)
* [High Traffic -- IPA/SXL](https://techdocs.akamai.com/alerts-app/docs/high-traffic-ipa-sxl.md)
* [High Traffic Origin - Content Delivery](https://techdocs.akamai.com/alerts-app/docs/high-traffic-origin-content-deliv.md)
* [High Traffic Origin -- HLS](https://techdocs.akamai.com/alerts-app/docs/high-traffic-origin-hls.md)
* [High Usage -- Streaming](https://techdocs.akamai.com/alerts-app/docs/high-usage-streaming.md)
* [High Utilization](https://techdocs.akamai.com/alerts-app/docs/high-utilization.md)
* [High Volume](https://techdocs.akamai.com/alerts-app/docs/high-volume.md)
* [High Volume -- HLS](https://techdocs.akamai.com/alerts-app/docs/high-volume-hls.md)
* [Incomplete Downloads -- Content Delivery](https://techdocs.akamai.com/alerts-app/docs/incomplete-dls-content-deliv.md)
* [Incomplete Downloads -- HLS](https://techdocs.akamai.com/alerts-app/docs/incomplete-dls-hls.md)
* [Ingest HTTP Upload Errors](https://techdocs.akamai.com/alerts-app/docs/ingest-http-upload-err.md)
* [Input Packet Loss for a Stream](https://techdocs.akamai.com/alerts-app/docs/input-packet-loss-stream.md)
* [Input Packet Loss for a stream bitrate](https://techdocs.akamai.com/alerts-app/docs/input-packet-loss-stream-bitrate.md)
* [Interface errors](https://techdocs.akamai.com/alerts-app/docs/itf-err.md)
* [Large Amount of MCDN Traffic Delivered from Akamai Intelligent Platform (AIP) - reported by maprule](https://techdocs.akamai.com/alerts-app/docs/large-amount-mcdn-traffic-delivered-akamai-intelligent-platform-aip-rpted-maprule.md)
* [Link Down](https://techdocs.akamai.com/alerts-app/docs/link-down.md)
* [Load Object File Invalid or Cannot be Fetched](https://techdocs.akamai.com/alerts-app/docs/load-object-file-invalid-cannot-fetched.md)
* [Load Object File is Stale](https://techdocs.akamai.com/alerts-app/docs/load-object-file-stale.md)
* [Localhost Traffic Matched Old VCD](https://techdocs.akamai.com/alerts-app/docs/localhost-traffic-matched-old-vcd.md)
* [Loss of a specific stream bitrate](https://techdocs.akamai.com/alerts-app/docs/loss-specific-stream-bitrate.md)
* [Low cache offload in MCDN edge cache tier - reported by cluster](https://techdocs.akamai.com/alerts-app/docs/low-cache-offload-mcdn-edge-cache-tier-rpted-cluster.md)
* [Low cache offload in MCDN edge cache tier - reported by maprule](https://techdocs.akamai.com/alerts-app/docs/low-cache-offload-mcdn-edge-cache-tier-rpted-maprule.md)
* [Low cache offload in MCDN grandparent cache tier - reported by cluster](https://techdocs.akamai.com/alerts-app/docs/low-cache-offload-mcdn-grandparent-cache-tier-rpted-cluster.md)
* [Low cache offload in MCDN grandparent cache tier - reported by maprule](https://techdocs.akamai.com/alerts-app/docs/low-cache-offload-mcdn-grandparent-cache-tier-rpted-maprule.md)
* [Low cache offload in MCDN parent cache tier - reported by cluster](https://techdocs.akamai.com/alerts-app/docs/low-cache-offload-mcdn-parent-cache-tier-rpted-cluster.md)
* [Low cache offload in MCDN parent cache tier - reported by maprule](https://techdocs.akamai.com/alerts-app/docs/low-cache-offload-mcdn-parent-cache-tier-rpted-maprule.md)
* [Low Offload Hits](https://techdocs.akamai.com/alerts-app/docs/low-offload-hits.md)
* [Low Offload Traffic](https://techdocs.akamai.com/alerts-app/docs/low-offload-traffic.md)
* [Low Streaming Traffic - FLASH](https://techdocs.akamai.com/alerts-app/docs/low-streaming-traffic-flash.md)
* [Low Traffic -- Content Delivery](https://techdocs.akamai.com/alerts-app/docs/low-traffic-content-deliv.md)
* [No DS record in parent zone](https://techdocs.akamai.com/alerts-app/docs/no-ds-record-parent-zone.md)
* [Object Caching - 403+'l': File Too Large](https://techdocs.akamai.com/alerts-app/docs/object-caching-403l-file-too-large.md)
* [Origin Access Denied (HTTP 401 and 403 errors)](https://techdocs.akamai.com/alerts-app/docs/origin-access-denied-http-401-403-err.md)
* [Origin Connection Failure](https://techdocs.akamai.com/alerts-app/docs/origin-connection-failure.md)
* [Origin DNS Failure](https://techdocs.akamai.com/alerts-app/docs/origin-dns-failure.md)
* [Origin HTTP Status Code](https://techdocs.akamai.com/alerts-app/docs/origin-http-status-code.md)
* [Origin Object Not Found (HTTP 404 errors)](https://techdocs.akamai.com/alerts-app/docs/origin-object-found-http-404-err.md)
* [Origin Read Error](https://techdocs.akamai.com/alerts-app/docs/origin-read-err.md)
* [Origin Server Failure (HTTP 5xx errors)](https://techdocs.akamai.com/alerts-app/docs/origin-server-failure-http-5xx-err.md)
* [Origin SSL Transaction Failure](https://techdocs.akamai.com/alerts-app/docs/origin-ssl-transaction-failure.md)
* [Origin Threshold Alert (IPA)](https://techdocs.akamai.com/alerts-app/docs/origin-threshold-alert-ipa.md)
* [Page Failure](https://techdocs.akamai.com/alerts-app/docs/page-failure.md)
* [Page Validation Failure](https://techdocs.akamai.com/alerts-app/docs/page-val-failure.md)
* [SaaS Application Request-to-User Ratio per Contract](https://techdocs.akamai.com/alerts-app/docs/saas-app-req-user-ratio-per-contract.md)
* [SaaS Application Request-to-User Ratio per CP Code](https://techdocs.akamai.com/alerts-app/docs/saas-app-req-user-ratio-per-cp-code.md)
* [SLA Availability](https://techdocs.akamai.com/alerts-app/docs/sla-availability.md)
* [SLA Performance](https://techdocs.akamai.com/alerts-app/docs/sla-perf.md)
* [Stale playlist detected](https://techdocs.akamai.com/alerts-app/docs/stale-playlist-detected.md)
* [Stream BitRate](https://techdocs.akamai.com/alerts-app/docs/stream-bitrate.md)
* [Stream Failure](https://techdocs.akamai.com/alerts-app/docs/stream-failure.md)
* [Stream Ingest Stopped](https://techdocs.akamai.com/alerts-app/docs/stream-ingest-stopped.md)
* [Stream Start-up Time](https://techdocs.akamai.com/alerts-app/docs/stream-start-up-time.md)
* [SureRoute Object Failure Alert](https://techdocs.akamai.com/alerts-app/docs/sureroute-object-failure-alert.md)
* [Test Availability](https://techdocs.akamai.com/alerts-app/docs/test-availability.md)
* [Too many HTTP errors from an MCDN cluster - reported by cluster, select CPcode](https://techdocs.akamai.com/alerts-app/docs/many-http-err-mcdn-cluster-rpted-cluster-select-cpcode.md)
* [Too many requests on a SaaS configuration have no application-id defined](https://techdocs.akamai.com/alerts-app/docs/many-req-saas-config-have-no-app-id-defined.md)
* [Too many requests on a SaaS configuration have no customer-id](https://techdocs.akamai.com/alerts-app/docs/many-req-saas-config-have-no-customer-id.md)
* [Too many requests on a SaaS configuration have no user-id defined](https://techdocs.akamai.com/alerts-app/docs/many-req-saas-config-have-no-user-id-defined.md)
* [Too many servers down or suspended within MCDN edge cache tier - reported by cluster](https://techdocs.akamai.com/alerts-app/docs/many-servers-down-suspended-within-mcdn-edge-cache-tier-rpted-cluster.md)
* [Too many servers down or suspended within MCDN edge cache tier - reported by maprule](https://techdocs.akamai.com/alerts-app/docs/many-servers-down-suspended-within-mcdn-edge-cache-tier-rpted-maprule.md)
* [Too many servers down or suspended within MCDN grandparent cache tier - reported by cluster](https://techdocs.akamai.com/alerts-app/docs/many-servers-down-suspended-within-mcdn-grandparent-cache-tier-rpted-cluster.md)
* [Too many servers down or suspended within MCDN grandparent cache tier - reported by maprule](https://techdocs.akamai.com/alerts-app/docs/many-servers-down-suspended-within-mcdn-grandparent-cache-tier-rpted-maprule.md)
* [Too many servers down or suspended within MCDN parent cache tier - reported by cluster](https://techdocs.akamai.com/alerts-app/docs/many-servers-down-suspended-within-mcdn-parent-cache-tier-rpted-cluster.md)
* [Too many servers down or suspended within MCDN parent cache tier - reported by maprule](https://techdocs.akamai.com/alerts-app/docs/many-servers-down-suspended-within-mcdn-parent-cache-tier-rpted-maprule.md)
* [Unauthorized Localhost Traffic](https://techdocs.akamai.com/alerts-app/docs/unauthorized-localhost-traffic.md)
* [Zone Approaching Resource Record Limit](https://techdocs.akamai.com/alerts-app/docs/zone-approaching-resource-record-limit.md)
* [Zone SOA Ahead](https://techdocs.akamai.com/alerts-app/docs/zone-soa-ahead.md)