I'm trying to debug what's going on with
https://issues.apache.org/jira/browse/DRILL-4704. Some selects involving an
equality test for a decimal value don't work properly (details in the JIRA).
With Intellij IDEA debugger remotely attached to Drill 1.6.0, I'm seeing some
stack frames like these:
"28a8f4b3-7e41-05d9-e4d6-aa63d3717bee:frag:0:0@9112" daemon prio=10 tid=0x3c
nid=NA runnable
java.lang.Thread.State: RUNNABLE
at
org.apache.drill.exec.record.MaterializedField.getPrecision(MaterializedField.java:169)
at
org.apache.drill.exec.test.generated.ProjectorGen0.doEval(ProjectorTemplate.java:43)
at
org.apache.drill.exec.test.generated.ProjectorGen0.projectRecords(ProjectorTemplate.java:62)
at
org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doWork(ProjectRecordBatch.java:172)
at
org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:93)
at
org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:12
...
28a8f4b3-7e41-05d9-e4d6-aa63d3717bee:frag:0:0@9112" daemon prio=10 tid=0x3c
nid=NA runnable
java.lang.Thread.State: RUNNABLE
at
org.apache.drill.exec.record.MaterializedField.getScale(MaterializedField.java:166)
at
org.apache.drill.exec.test.generated.FiltererGen1.doEval(FilterTemplate2.java:51)
at
org.apache.drill.exec.test.generated.FiltererGen1.filterBatchNoSV(FilterTemplate2.java:99)
at
org.apache.drill.exec.test.generated.FiltererGen1.filterBatch(FilterTemplate2.java:72)
at
org.apache.drill.exec.physical.impl.filter.FilterRecordBatch.doWork(FilterRecordBatch.java:82)
....
In either case, the indicated FilterTemplate2 or ProjectorTemplate is in a
different package org.apache.drill.exec.test.generated than that of the
corresponding Java in the Drill 1.6.0 source code, and line numbers don't
match. For someone who is trying to understand what's going on using the
debugger (usually a good strategy), it's difficult to follow what is happening
at runtime. It's looking like code is generated from the template code at
runtime, compiled at runtime, and that's why I'm unable to debug symbolically
into those classes.
Can someone who understands Drill far better than I do shed some light? What
is a good way to debug this problem?
Thanks,
Dave Oshinsky
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