Customer Knowledge Base

Imply Pivot

• Alert Condition Values Show Empty in UI When Value is 0 in API Request
• How to use mandrill as mailTransportOptions as delivery option in pivot to schedule reports ?

Security

• "Invalid Authenticity Token" error when logging into support.imply.io

Imply Cloud

• How to deploy custom applications on imply cloud instances using Imply-cloud-manager UI
• Accessing your Imply Cloud VPC from another VPC using a peering connection
• Failed to create Imply Cloud cluster due to error "not authorized to perform: iam:PassRole on resource"

Installation and Operations

• Druid - LDAP and Active Directory (AD) Integration
• How to mask passwords/secret keys from being logged into the druid server logs
• Migrate existing Druid Cluster to a new Imply cluster
• Prometheus Emitter Setup Failing with org.apache.druid.java.util.common.ISE: Emitter was null, that's bad!
• Migrating metadata from Postgres to MySQL
• Druid ingestion task fails with exception related to AWS when using Google Cloud Storage

See all 23 articles

Data Ingestion

• What happens when changing granularity during data ingestion?
• Reduced throughput from Kafka/Kinesis indexing service due to WARN "Ingestion was throttled.. because persists were pending"
• Hadoop Ingestion failed due to error "io.druid.java.util.common.ISE: Job[class io.druid.indexer.DetermineHashedPartitionsJob] failed!"
• How to estimate cost savings from rollup aggregation
• Ingestion failed from AWS S3 due to error "java.net.SocketException: Connection reset"
• Data ingestion failure due to error `Numeric columns do not support multivalue rows`

See all 27 articles

Data Modeling

• How to rename dimension during raw data ingestion
• How to create a new dimension and fill the column with default value during ingestion
• How to concatenate two columns in Imply UI

Querying and Data Analysis

• Druid Console fallback for XL clusters
• Druid indexed tables (alpha)
• Event Annotations (alpha)
• Enable Query or Request logging for Druid
• Getting exact count(distinct) results, using druid SQL
• Querying Druid from the command line

See all 9 articles

Log Analysis

• HTTP POST fails to submit task to Overlord due to error "Channel disconnected"
• If you're having a "too many open files" problem.. I feel bad for you son, but I got 99 problems and a ulimit setting ain't one.

Performance Tuning and Monitoring

• Imply with InfluxDB extension
• Single-dim Compaction task fails with: Unrecognized token 'Cannot'
• How to determine the number of slots required for auto compaction?
• Tuning Druid for Large Result Sets
• Profiling Druid queries using flame graphs
• Receiving error message "Error attaching to process: Doesn't appear to be a HotSpot VM (could not find symbol "gHotSpotVMTypes" when trying to execute jstack command

See all 7 articles

Integrations

• Ingesting Data to Druid from Azure Event Hubs
• How to connect an Imply druid cluster with SuperSet
• Connecting Tableau to Druid with JDBC
• Qubole - Imply Cloud Integration
• Connecting Microsoft Excel or Power BI to Apache Druid via Power Query
• Using Oracle Cloud S3-compatible Object Storage as a deep storage for Druid

See all 8 articles