Nathan Bamford created HIVE-17223:
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Summary: HCatReader throws exception attempting to read a view
Key: HIVE-17223
URL: https://issues.apache.org/jira/browse/HIVE-17223
Project: Hive
Issue Type: Bug
Components: HCatalog
Affects Versions: 1.2.1
Reporter: Nathan Bamford
When HCatReader.prepareRead is called with a ReadEntity built with a view, a
null exception is thrown:
HCatOutputFormat not initialized, setOutput has to be called. Cause :
java.io.IOException: java.lang.NullPointerException
org.apache.hive.hcatalog.data.transfer.impl.HCatInputFormatReader.prepareRead(HCatInputFormatReader.java:73)
net.redpoint.hiveclient.DMHCatSplitReader.getSplitInfo(DMHCatSplitReader.java:127)
Caused by: java.io.IOException: java.lang.NullPointerException
org.apache.hive.hcatalog.mapreduce.HCatInputFormat.setInput(HCatInputFormat.java:97)
org.apache.hive.hcatalog.mapreduce.HCatInputFormat.setInput(HCatInputFormat.java:61)
org.apache.hive.hcatalog.data.transfer.impl.HCatInputFormatReader.prepareRead(HCatInputFormatReader.java:65)
net.redpoint.hiveclient.DMHCatSplitReader.getSplitInfo(DMHCatSplitReader.java:127)
Caused by: java.lang.NullPointerException
java.lang.Class.forName0(Native Method)
java.lang.Class.forName(Class.java:274)
org.apache.hadoop.hive.common.JavaUtils.loadClass(JavaUtils.java:78)
org.apache.hadoop.hive.common.JavaUtils.loadClass(JavaUtils.java:74)
org.apache.hive.hcatalog.mapreduce.FosterStorageHandler.<init>(FosterStorageHandler.java:68)
org.apache.hive.hcatalog.common.HCatUtil.getStorageHandler(HCatUtil.java:404)
org.apache.hive.hcatalog.common.HCatUtil.getStorageHandler(HCatUtil.java:367)
org.apache.hive.hcatalog.mapreduce.InitializeInput.extractPartInfo(InitializeInput.java:158)
org.apache.hive.hcatalog.mapreduce.InitializeInput.getInputJobInfo(InitializeInput.java:137)
org.apache.hive.hcatalog.mapreduce.InitializeInput.setInput(InitializeInput.java:86)
org.apache.hive.hcatalog.mapreduce.HCatInputFormat.setInput(HCatInputFormat.java:95)
org.apache.hive.hcatalog.mapreduce.HCatInputFormat.setInput(HCatInputFormat.java:61)
org.apache.hive.hcatalog.data.transfer.impl.HCatInputFormatReader.prepareRead(HCatInputFormatReader.java:65)
Digging into the code a little bit, I discovered that the StorageDescriptor
associated with the view has its serializationLib set to null, and this
eventually causes the null error when calling HCatUtil.getStorageHandler.
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