---
id: 4d39eb40-d19c-4363-8b0b-fb583b40d76f
---

# Duplicate Entry Error in Istio Pilot
---

This incident type involves a duplicate entry error in Istio Pilot, which may result in issues with the service it is providing. The error message usually contains information about the instance and labels involved in the error. It is important to investigate and resolve this issue promptly to prevent any further disruptions.

### Parameters
```shell
export NAMESPACE="PLACEHOLDER"

export POD_NAME="PLACEHOLDER"

export ENTRY="PLACEHOLDER"

export YOUR_CONTAINER_NAME="PLACEHOLDER"

export YOUR_LOG_FILE_PATH="PLACEHOLDER"

export ISTIO_PILOT_APP_LABEL="PLACEHOLDER"

export ISTIO_PILOT_DEPLOYMENT_NAME="PLACEHOLDER"
```

## Debug

### Find the Istio Pilot pods running
```shell
kubectl get pods -n ${NAMESPACE} -l app=istio-pilot
```

### Get logs from the Istio Pilot pod
```shell
kubectl logs ${POD_NAME} -n ${NAMESPACE} istio-proxy
```

### Check the Istio Pilot configuration file
```shell
kubectl exec -it ${POD_NAME} -n ${NAMESPACE} -- cat /etc/istio/proxy/envoy-rev0.json
```

### Check the Istio Pilot configuration file for duplicate entries
```shell
kubectl exec -it ${POD_NAME} -n ${NAMESPACE} -- cat /etc/istio/proxy/envoy-rev0.json | grep -c ${ENTRY}
```

### Check the Istio Pilot configuration file for all entries
```shell
kubectl exec -it ${POD_NAME} -n ${NAMESPACE} -- cat /etc/istio/proxy/envoy-rev0.json | grep ${ENTRY}
```

### Configuration errors: The duplicate entry error may occur if there are configuration errors in the instance or labels of Istio Pilot. This could happen due to a misconfiguration while setting up Istio Pilot or changes made to the configuration by mistake.
```shell
bash

#!/bin/bash



# Set variables

NAMESPACE=${NAMESPACE}

POD_NAME=${POD_NAME}

CONTAINER_NAME=${YOUR_CONTAINER_NAME}

LOG_FILE=${YOUR_LOG_FILE_PATH}



# Get logs from the Istio Pilot container

kubectl logs -n $NAMESPACE $POD_NAME -c $CONTAINER_NAME > $LOG_FILE 2>&1



# Check if the log file contains any configuration errors

if grep -q "configuration error" $LOG_FILE; then

  echo "Configuration error detected in Istio Pilot logs."

  echo "Please check the configuration settings for Istio Pilot."

else

  echo "No configuration errors detected in Istio Pilot logs."

fi


```

## Repair

### Restart the Istio Pilot service to see if that resolves the issue. If not, attempt to roll back to a previous version of the service that was working correctly.
```shell


#!/bin/bash



# Restart Istio Pilot service

kubectl rollout restart deployment/${ISTIO_PILOT_DEPLOYMENT_NAME}



# Wait for the service to restart

echo "Waiting for Istio Pilot service to restart..."

sleep 20



# Check if the service is running

if kubectl get pods -l app=${ISTIO_PILOT_APP_LABEL} | grep Running; then

    echo "Istio Pilot service restarted successfully!"

else

    echo "Failed to restart Istio Pilot service. Rolling back to previous version..."



    # Rollback to previous version

    kubectl rollout undo deployment/${ISTIO_PILOT_DEPLOYMENT_NAME}



    # Wait for the service to roll back

    echo "Waiting for Istio Pilot service to roll back..."

    sleep 20



    # Check if the service is running

    if kubectl get pods -l app=${ISTIO_PILOT_APP_LABEL} | grep Running; then

        echo "Istio Pilot service rolled back successfully!"

    else

        echo "Failed to roll back Istio Pilot service. Please investigate further."

    fi

fi


```

This incident type involves a duplicate entry error in Istio Pilot, which may result in issues with the service it is providing. The error message usually contains information about the instance and labels involved in the error. It is important to investigate and resolve this issue promptly to prevent any further disruptions.


This incident type occurs when the number of 4xx errors on Traffic Server is at an anomalous level, higher than usual. It could be an indicator of an issue with the server or an increase in traffic that is causing errors. It requires investigation and resolution to ensure the server is functioning correctly and not impacting users.


High 4xx Errors on Traffic Server

This incident type refers to the failure of a systemd service on a particular host instance. The incident could be triggered by various causes such as a software bug, hardware failure, or system overload. This type of incident can cause downtime or service disruption to the affected host instance, which may require immediate resolution to restore normal operations.


Host systemd service crashed (instance) incident.

This incident type involves an issue with Kubernetes deployments where the expected number of pods to run is not matching the actual number of pods running. This can lead to alerts being triggered and potential disruptions in the system.


Kubernetes pods not starting - Deployment issue

The incident type of "Kubernetes deployment with multiple restarts" indicates that a Kubernetes deployment has experienced multiple restarts within a certain timeframe, which is usually indicative of a problem. Kubernetes is a popular container orchestration platform that automates the deployment, scaling, and management of containerized applications. When a deployment experiences multiple restarts, it can impact the availability and performance of the application, and can be a sign of underlying issues that need to be addressed. This incident type is typically monitored and managed by DevOps teams responsible for ensuring the health and reliability of Kubernetes-based applications.


Kubernetes deployment with multiple restarts

This incident type involves monitoring the replicas of a Kubernetes Statefulset, which is a type of workload in Kubernetes used for stateful applications. The incident is triggered when more than one replica's pods are down, creating an unsafe situation for manual operations. This incident is critical and requires immediate attention to resolve the issue and ensure the smooth functioning of the stateful applications.


Kubernetes Statefulset Replicas Monitoring Incident

```shell
export NAMESPACE="PLACEHOLDER"

export POD_NAME="PLACEHOLDER"

export ENTRY="PLACEHOLDER"

export YOUR_CONTAINER_NAME="PLACEHOLDER"

export YOUR_LOG_FILE_PATH="PLACEHOLDER"

export ISTIO_PILOT_APP_LABEL="PLACEHOLDER"

export ISTIO_PILOT_DEPLOYMENT_NAME="PLACEHOLDER"
```


### Find the Istio Pilot pods running

```shell
kubectl get pods -n ${NAMESPACE} -l app=istio-pilot
```

### Get logs from the Istio Pilot pod

```shell
kubectl logs ${POD_NAME} -n ${NAMESPACE} istio-proxy
```

### Check the Istio Pilot configuration file

```shell
kubectl exec -it ${POD_NAME} -n ${NAMESPACE} -- cat /etc/istio/proxy/envoy-rev0.json
```

### Check the Istio Pilot configuration file for duplicate entries

```shell
kubectl exec -it ${POD_NAME} -n ${NAMESPACE} -- cat /etc/istio/proxy/envoy-rev0.json | grep -c ${ENTRY}
```

### Check the Istio Pilot configuration file for all entries

```shell
kubectl exec -it ${POD_NAME} -n ${NAMESPACE} -- cat /etc/istio/proxy/envoy-rev0.json | grep ${ENTRY}
```

### Configuration errors: The duplicate entry error may occur if there are configuration errors in the instance or labels of Istio Pilot. This could happen due to a misconfiguration while setting up Istio Pilot or changes made to the configuration by mistake.

```shell
bash

#!/bin/bash



# Set variables

NAMESPACE=${NAMESPACE}

POD_NAME=${POD_NAME}

CONTAINER_NAME=${YOUR_CONTAINER_NAME}

LOG_FILE=${YOUR_LOG_FILE_PATH}



# Get logs from the Istio Pilot container

kubectl logs -n $NAMESPACE $POD_NAME -c $CONTAINER_NAME > $LOG_FILE 2>&1



# Check if the log file contains any configuration errors

if grep -q "configuration error" $LOG_FILE; then

  echo "Configuration error detected in Istio Pilot logs."

  echo "Please check the configuration settings for Istio Pilot."

else

  echo "No configuration errors detected in Istio Pilot logs."

fi


```


### Restart the Istio Pilot service to see if that resolves the issue. If not, attempt to roll back to a previous version of the service that was working correctly.

```shell


#!/bin/bash



# Restart Istio Pilot service

kubectl rollout restart deployment/${ISTIO_PILOT_DEPLOYMENT_NAME}



# Wait for the service to restart

echo "Waiting for Istio Pilot service to restart..."

sleep 20



# Check if the service is running

if kubectl get pods -l app=${ISTIO_PILOT_APP_LABEL} | grep Running; then

    echo "Istio Pilot service restarted successfully!"

else

    echo "Failed to restart Istio Pilot service. Rolling back to previous version..."



    # Rollback to previous version

    kubectl rollout undo deployment/${ISTIO_PILOT_DEPLOYMENT_NAME}



    # Wait for the service to roll back

    echo "Waiting for Istio Pilot service to roll back..."

    sleep 20



    # Check if the service is running

    if kubectl get pods -l app=${ISTIO_PILOT_APP_LABEL} | grep Running; then

        echo "Istio Pilot service rolled back successfully!"

    else

        echo "Failed to roll back Istio Pilot service. Please investigate further."

    fi

fi


```


Duplicate Entry Error in Istio Pilot

Overview

Parameters

Debug

Find the Istio Pilot pods running

Get logs from the Istio Pilot pod

Check the Istio Pilot configuration file

Check the Istio Pilot configuration file for duplicate entries

Check the Istio Pilot configuration file for all entries

Configuration errors: The duplicate entry error may occur if there are configuration errors in the instance or labels of Istio Pilot. This could happen due to a misconfiguration while setting up Istio Pilot or changes made to the configuration by mistake.

Repair

Restart the Istio Pilot service to see if that resolves the issue. If not, attempt to roll back to a previous version of the service that was working correctly.

Learn more

Related Runbooks

High 4xx Errors on Traffic Server

Host systemd service crashed (instance) incident.

Kubernetes pods not starting - Deployment issue

Kubernetes deployment with multiple restarts

Support