> ## Documentation Index > Fetch the complete documentation index at: https://docs.prophecy.ai/llms.txt > Use this file to discover all available pages before exploring further. # Understand fabric diagnostics > Troubleshoot fabric issues using diagnostics Troubleshooting Prophecy fabrics is easy with built-in diagnostics. The descriptions are designed to help users to independently identify and resolve issues. When creating or connecting to a fabric, Prophecy automatically tests for connectivity. This feature helps users to determine whether the issue lies within Prophecy itself or in other components of the data ecosystem. ## Diagnostics error codes | Error Code | Symptom | Provider | Cause | Resolution | | ---------- | ------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `10000` | `Is missing from the classpath` | [Databricks](/data-engineering/fabrics/spark-provider/databricks/databricks) | Prophecy Library(Scala) is incorrect. You're probably using thin jar. | Use assembly `jar(${scalaFatJarName})` in the library section of the fabric settings. | | `10001` | `DRIVER_LIBRARY_INSTALLATION_FAILURE` | [Databricks](/data-engineering/fabrics/spark-provider/databricks/databricks) | Prophecy Library(Scala/Python) is incorrect. Databricks could not install it. | Please provide the valid library path in the fabric. | | `10002` | `object prophecy is not a member of package` | [Livy](/data-engineering/fabrics/spark-provider/livy/) | Prophecy Library(Scala) is incorrect. | Please ensure that the library path exists and you're using the assembly `jar(${scalaFatJarName})`. | | `10003` | `cannot be added to user sessions` and `prophecy_libs` | [Livy](/data-engineering/fabrics/spark-provider/livy/) | Prophecy Library(Python) is incorrect. | Please ensure that the library path exists and you're using correct `file(${pythonPLibName})`. | | `10004` | `for method` and `too many arguments` | [Livy](/data-engineering/fabrics/spark-provider/livy/) | Prophecy Library(Scala) is incompatible. | Please use the correct `version(${Globals.prophecyLibsVersion})` in the library section of fabric settings. | | `10005` | `No module named` and `prophecy` | [Livy](/data-engineering/fabrics/spark-provider/livy/) | Prophecy Library(Python) is incorrect. | Please provide the valid library path in the fabric. | | `10006` | `illegal start of simple expression` | [Livy](/data-engineering/fabrics/spark-provider/livy/) | Python version in livy/hadoop is incorrect. | Please make sure you have python3 there. | | `10007` | `IncompatibleClassChangeError` | [Livy](/data-engineering/fabrics/spark-provider/livy/) | Prophecy Library(Scala) is incompatible with your Spark version. | Please use the correct assembly `jar(${scalaFatJarName})` in the library section of the fabric settings. | | `10008` | `"FileNotFoundException` and `prophecy_libs"` | [Livy](/data-engineering/fabrics/spark-provider/livy/) | Prophecy Library(Python) path does not exist. | Please ensure that the file exists as per the path in the library section of the fabric settings. | | `10009` | `503 Service Temporarily Unavailable` and `LivyRestClient` | [Livy](https://livy.apache.org/docs/latest/rest-api.html) | Livy service is down. | Please make sure the livy service is up before executing this command. | | `10010` | `SQLNonTransientConnectionException, rds.amazonaws.com` or `Unable to instantiate, HiveMetaStoreClient` | [Unity Catalog](https://docs.databricks.com/en/resources/supported-regions.html#rds) | Databricks cluster can't access RDS service. | Please ensure that the cluster can access to the same region's RDS endpoint as documented [here](https://docs.databricks.com/en/resources/supported-regions.html#rds). | | `10011` | `UnauthorizedCommandException` and `This execution contained at leas` and `disallowed language` | [Unity Catalog](https://docs.databricks.com/en/resources/supported-regions.html#rds) | Shared cluster in unity catalog does not allow Scala commands. | Please use this cluster with Python Pipeline. | | `10012` | `UnauthorizedCommandException` and `This execution contained at leas` and `disallowed language` | [Databricks](https://docs.databricks.com/en/administration-guide/users-groups/index.html) | This cluster does not allow `${pipeline's language}` command. | Please check with the Databricks workspace administrator to provide the execution access to `${pipeline's language}` language. | | `10013` | `javax.net.ssl.SSLHandshakeException` and `PKIX path building failed` | Livy / [EMR](https://docs.aws.amazon.com/emr/latest/ManagementGuide/emr-security.html) | Certificates provided in EMR cluster's security configuration are wrong. | Please ensure that EMR cluster's security configuration is using correct certificates. | | `10014` | `HostUnreachableErrorCode_10014` | [Databricks](https://docs.databricks.com/en/administration-guide/users-groups/index.html) | Unable to reach Databricks endpoint. | Make sure the workspace is active and reachable. | | `10015` | `HiveMetastoreNotEnabledErrorCode_10015` | Hive Metastore | We were unable to write execution metrics because Hive Metastore is not enabled on your Spark. | Please enable Hive Metastore on Spark, or disable execution metrics in Prophecy. | | `10016` | `AuthenticationFAiled_10016` | [Livy](/data-engineering/fabrics/spark-provider/livy/) | Authentication failed. Wrong or no auth credentials were provided. | Make sure correct auth credentials are provided. | | `10ZZZ` | `Library installation attempted on the driver node of cluster and failed` | [Databricks](/data-engineering/fabrics/spark-provider/databricks/databricks) | Databricks runtimes 16.4 and later default to Scala 2.13. | Update Prophecy to version 4.2.0.1+ and update ProphecyScalaLibs for compatibility with Scala 2.13. |