Alan
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Recent activity by Alan-
Import Job from Hive Throws Kerberos Error. HDFS Import Works.
Problem The following error is seen when attempting to run an import job against Hive: Caused by: GSSException: No valid credentials provided (Mechanism level: Failed to find any Kerberos tgt) at...
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Unable to Build LDAP/AD Cache After Upgrade to 6.3 or 6.4
Problem While building the LDAP/Active Directory cache, the following error is seen in the conductor.log and the cache fails to build: Caused by: javax.naming.PartialResultException: Unprocessed Co...
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Improving Tez Session and Task Allocation on a Heavily Utilized Cluster
Problem Jobs occasionally take long periods of time to start, or they start and sit at 0% progress. Cause When a Hadoop cluster is under heavy utilization, YARN and the Tez framework may wait for ...
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Many WARN Messages After Upgrading to 6.3 or 6.4 During Conductor Startup
Problem After upgrading to 6.3 or 6.4, A number of WARN messages are seen during conductor startup: Example: [anonymous] WARN [2018-01-26 14:19:14.677] [main] (PluginManifestParser.java:125) - Fail...
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Can't Restart Datameer: Read-only File System
Problem Datameer started producing 404 errors for many pages. Upon attempting to restart the conductor, it would not start and the following error was seen in the jvm-stdout.log file: Read-only fil...
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Data Link Always Uses Five Splits.
Problem If you have a file-based data source with many partitions and a significant amount of data, poor performance can be observed when running a data link. Upon investigation of the YARN applica...
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Salesforce: Bad Request (400): invalid query locator
Problem Intermittently, Import Jobs and Data Links from Salesforce will fail with the following error: ErrorLogException: Failed to read record source, byte position is 500 Caused by: datameer.webs...
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HiveServer2 Data Link Fails With "/ by zero" Error
Problem Running a data link to generate a sample results in the following error: java.lang.ArithmeticException: / by zero at datameer.dap.common.job.mr.input.v2.impl.SamplingSplitter.createSplits(S...
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After upgrade to 6.3.x, Updating cached LDAP users and groups fails
Problem After upgrading to 6.3.x, the LDAP cache fails to build or refresh. The following error is seen in the conductor.log: [anonymous] WARN [2017-11-08 14:47:12.852] [ldap-cache-update-operatio...
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MapR: Cannot rename across volumes, falling back on copy/delete semantics
Problem Jobs are taking a long time to run, and the following error is seen in the job.log and YARN application log: INFO [1970-01-01 00:00:00.001] [MrPlanRunnerV2] (MapRFileSystem.java:1086) - Can...