写了一条hive sql ，其中条件中存在 dt>=20150101 and dt<=20150228 这样的条件，原来执行没问题，今天就抛出
FAILED: Hive Internal Error: java.lang.NullPointerException(null)
java.lang.NullPointerException
at org.apache.hadoop.hive.ql.optimizer.pcr.PcrExprProcFactory.opAnd(PcrExprProcFactory.java:128)
at org.apache.hadoop.hive.ql.optimizer.pcr.PcrExprProcFactory$GenericFuncExprProcessor.process(PcrExprProcFactory.java:267)
at org.apache.hadoop.hive.ql.lib.DefaultRuleDispatcher.dispatch(DefaultRuleDispatcher.java:89)
at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.dispatch(DefaultGraphWalker.java:88)
at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.walk(DefaultGraphWalker.java:128)
at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.startWalking(DefaultGraphWalker.java:102)
at org.apache.hadoop.hive.ql.optimizer.pcr.PcrExprProcFactory.walkExprTree(PcrExprProcFactory.java:450)
at org.apache.hadoop.hive.ql.optimizer.pcr.PcrOpProcFactory$FilterPCR.process(PcrOpProcFactory.java:149)
at org.apache.hadoop.hive.ql.lib.DefaultRuleDispatcher.dispatch(DefaultRuleDispatcher.java:89)
at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.dispatch(DefaultGraphWalker.java:88)
at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.walk(DefaultGraphWalker.java:128)
at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.startWalking(DefaultGraphWalker.java:102)
at org.apache.hadoop.hive.ql.optimizer.pcr.PartitionConditionRemover.transform(PartitionConditionRemover.java:78)
at org.apache.hadoop.hive.ql.optimizer.Optimizer.optimize(Optimizer.java:85)
at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:6630)
at org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:238)
at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:340)
at org.apache.hadoop.hive.ql.Driver.run(Driver.java:736)
at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:209)
at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:286)
at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:485)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.apache.hadoop.util.RunJar.main(RunJar.java:197)
这样的错误，仔细检查sql也没问题，以前执行也没问题。
show partitions 之后 发现有一个分区
dt=test
drop之后 alter table table_name drop partition(dt='test');
执行正常。呵呵 思考吧