AmazonKeyspacesFixedRateThrottler: Detected a synchronous API call on a driver thread, failing because this can cause deadlocks.

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#7 opened on Apr 23, 2024 0 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 4/5
Estimated time: 3-5 days
Newbie friendliness: 25/100

Issue type: Bug
Clarity: Needs clarification
Activity status: Stale
Tech stack: aws, java
Domain: backend, databases

Research direction

Start by reproducing the failure with the AmazonKeyspacesFixedRateThrottler configuration shown in the issue and trace where the throttler is instantiated. Determine why synchronous API calls occur on the driver thread; done means the configuration initializes without the reported deadlock-prevention error.

Written by the indexing model from the issue text.

Description

Class AmazonKeyspacesFixedRateThrottler doesn't seem to work. The error is,

2024-04-23 01:08:22,107 ERROR [main] log.GlueLogger (GlueLogger.scala:error(7)): ERROR: Detected connectivity issue. Check the reference conf file/Glue connection for the source, the job is aborted java.io.IOException: Failed to open native connection to Cassandra at Profile based config at CassandraConnector.conf :: Error instantiating class com.aws.ssa.keyspaces.throttler.AmazonKeyspacesFixedRateThrottler (specified by advanced.throttler.class): Detected a synchronous API call on a driver thread, failing because this can cause deadlocks.

Here's the configuration block I'm using,

  advanced.throttler {
    class = com.aws.ssa.keyspaces.throttler.AmazonKeyspacesFixedRateThrottler
    max-requests-per-second = 100
    number-of-hosts = 3
    register-timeout = 15 seconds
  }

Dominant language: Java
Stars: 10
Forks: 6
PR merge metrics: No merged PRs in 30d

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