# Troubleshooting AEL Follow the suggestions in these topics to help resolve common issues with running transformations with the Adaptive Execution Layer. * [Steps cannot run in parallel](/install/9.3-install/pentaho-configuration/tasks-to-be-performed-by-an-it-administrator/set-up-the-adaptive-execution-layer-ael/troubleshooting-ael-cp/steps-cannot-run-in-parallel.md) * [Table Input step fails](/install/9.3-install/pentaho-configuration/tasks-to-be-performed-by-an-it-administrator/set-up-the-adaptive-execution-layer-ael/troubleshooting-ael-cp/table-input-step-fails.md) * [User ID below minimum allowed](/install/9.3-install/pentaho-configuration/tasks-to-be-performed-by-an-it-administrator/set-up-the-adaptive-execution-layer-ael/troubleshooting-ael-cp/user-id-below-minimum-allowed.md) * [Hadoop version conflict](/install/9.3-install/pentaho-configuration/tasks-to-be-performed-by-an-it-administrator/set-up-the-adaptive-execution-layer-ael/troubleshooting-ael-cp/hadoop-version-conflict.md) * [Hadoop libraries are missing](/install/9.3-install/pentaho-configuration/tasks-to-be-performed-by-an-it-administrator/set-up-the-adaptive-execution-layer-ael/troubleshooting-ael-cp/hadoop-libraries-are-missing.md) * [Spark libraries conflict with Hadoop libraries](/install/9.3-install/pentaho-configuration/tasks-to-be-performed-by-an-it-administrator/set-up-the-adaptive-execution-layer-ael/troubleshooting-ael-cp/spark-libraries-conflict-with-hadoop-libraries-ael-troubleshooting.md) * [Failed to find AVRO files](/install/9.3-install/pentaho-configuration/tasks-to-be-performed-by-an-it-administrator/set-up-the-adaptive-execution-layer-ael/troubleshooting-ael-cp/failed-to-find-avro-files-ael-troubleshooting.md) * [Unable to access Google Cloud Storage resources](/install/9.3-install/pentaho-configuration/tasks-to-be-performed-by-an-it-administrator/set-up-the-adaptive-execution-layer-ael/troubleshooting-ael-cp/unable-to-access-google-cloud-storage-resources-ael-troubleshooting.md) * [Unable to access AWS S3 resources](/install/9.3-install/pentaho-configuration/tasks-to-be-performed-by-an-it-administrator/set-up-the-adaptive-execution-layer-ael/troubleshooting-ael-cp/unable-to-access-aws-s3-resources-ael-troubleshooting.md) * [Internet Address data type fails](/install/9.3-install/pentaho-configuration/tasks-to-be-performed-by-an-it-administrator/set-up-the-adaptive-execution-layer-ael/troubleshooting-ael-cp/internet-address-data-type-fails.md) * [Message size exceeded](/install/9.3-install/pentaho-configuration/tasks-to-be-performed-by-an-it-administrator/set-up-the-adaptive-execution-layer-ael/troubleshooting-ael-cp/message-size-exceeded.md) * [Spark SQL catalyst errors using the Merge or Group By steps](/install/9.3-install/pentaho-configuration/tasks-to-be-performed-by-an-it-administrator/set-up-the-adaptive-execution-layer-ael/troubleshooting-ael-cp/spark-sql-catalyst-errors-using-merge-or-group-by-steps-ael-troubleshooting.md) * [Performance or memory issues](/install/9.3-install/pentaho-configuration/tasks-to-be-performed-by-an-it-administrator/set-up-the-adaptive-execution-layer-ael/troubleshooting-ael-cp/performance-or-memory-issues-ael-troubleshooting.md) * [Multiple steps in a transformation cannot generate files to the same location](/install/9.3-install/pentaho-configuration/tasks-to-be-performed-by-an-it-administrator/set-up-the-adaptive-execution-layer-ael/troubleshooting-ael-cp/multiple-steps-in-a-transformation-do-not-output-files-to-the-same-location.md) * [Cannot read footer in a Spark file](/install/9.3-install/pentaho-configuration/tasks-to-be-performed-by-an-it-administrator/set-up-the-adaptive-execution-layer-ael/troubleshooting-ael-cp/cannot-read-footer-in-a-spark-file-ael-troubleshooting.md) * [Errors when using Hive and AEL on a Hortonworks cluster](/install/9.3-install/pentaho-configuration/tasks-to-be-performed-by-an-it-administrator/set-up-the-adaptive-execution-layer-ael/troubleshooting-ael-cp/errors-when-using-hive-and-ael-on-a-hortonworks-cluster-ael-troubleshooting.md) * [Errors when using Hive and AEL on an Amazon EMR cluster](/install/9.3-install/pentaho-configuration/tasks-to-be-performed-by-an-it-administrator/set-up-the-adaptive-execution-layer-ael/troubleshooting-ael-cp/errors-when-using-hive-and-ael-on-an-amazon-emr-cluster-ael-troubleshooting.md) * [Driver timeout and deployment errors with AEL on secured clusters](/install/9.3-install/pentaho-configuration/tasks-to-be-performed-by-an-it-administrator/set-up-the-adaptive-execution-layer-ael/troubleshooting-ael-cp/driver-timeout-and-deployment-errors-with-ael-on-secured-clusters-ael-troubleshooting.md) * [Steps cannot run with Spark on AEL](/install/9.3-install/pentaho-configuration/tasks-to-be-performed-by-an-it-administrator/set-up-the-adaptive-execution-layer-ael/troubleshooting-ael-cp/steps-cannot-run-with-spark-on-ael.md) --- # 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