Ian
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Latest activity by Ian-
Ian created an article,
Explanation of Supervisor Exceptions: LOST_CONNECTION_WITH_STREAM, UNABLE_TO_CONNECT_TO_STREAM, UNHEALTHY_TASKS
QUESTION: What are the streaming exceptions for supervisors and how are they different? There are times where LOST_CONTACT_WITH_STREAM is shown and others where UNABLE_TO_CONNECT_TO_STREAM is shown...
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Ian created an article,
How to avoid index_parallel deadlocks in a busy cluster
OBJECTIVE: This article explains a configuration that can prevent index_parallel deadlocks in a cluster with high middle manager task slot utilization. ENVIRONMENT: This applies to clusters with mu...
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Ian created an article,
Historical will not start due to OOM and failed to map errors though there is enough heap available and ulimit is set very high
ISSUE: There are times when a historical will not start even though plenty of heap has been given to the JVM and ulimit has been set appropriately. The historical startup sequence will look no...
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Ian created an article,
Unified Console "Segments" UI is unavailable after 3.4 upgrade
ISSUE: Unified Console "Segments" UI is unavailable after 3.4 upgrade. The error states "Unknown exception / org.apache.calcite.runtime.CalciteContextException: From line 1, column 182 to line 1, ...
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Ian created an article,
How to Enable Basic Auth in Druid
Overview Basic Auth in Druid sets up an Authenticator that supports HTTP Basic authentication using the Druid metadata store or LDAP as its credentials store. It also sets up an Authorizer that im...
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Ian created an article,
How to Implement Role Level Connection Auth in Pivot and Druid
Overview Role Level Connection Auth is new in Imply 3.3 and higher. It allows the restriction of access to datasources at the Druid level via Pivot and within Druid itself. Role Level Connection ...