[Impala-ASF-CR] IMPALA-14370: [Patch 1 of 2] - OpenTelemetry Query Tracing Skips Queries with Leading Comments

["Jason Fehr (Code Review)" <ge...@cloudera.org>]

Jason Fehr has uploaded a new patch set (#10). ( http://gerrit.cloudera.org:8080/23777 )

Change subject: IMPALA-14370: [Patch 1 of 2] - OpenTelemetry Query Tracing Skips Queries with Leading Comments
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IMPALA-14370: [Patch 1 of 2] - OpenTelemetry Query Tracing Skips Queries with Leading Comments

Since OpenTelemetry traces must be opened before query planning
starts, a rudimentry text parser was implemented to determine, based
on the first query keyword, if the query should be traced. This
parser could be fooled by a multiline comment such as:
  /*/ comment */ select * from db.tbl
This type of leading comment would cause query tracing to be skipped.

Removes this parser using the frontend's parsing result to determine
if a query should be traced. The backend now queues a copy of all
necessary data until the frontend parses the query. At that point, a
JNI call is made to the backend letting it know whether or not to
trace the query. The backend either discards the queued data or
starts the OpenTelemetry trace and sends it to the trace management
system.

A new backend class has been added named "BufferedSpan". This class
replaces the existing "TimedSpan" class. This new class has the
ability to queue all necessary data for the root, init, submitted,
and planning spans until it is notified to start an OpenTelemetry
trace via the OpenTelemetry-cpp SDK. At that point, it creates a new
root span with child spans init and submitted started/ended and sent
to the OpenTelemetry trace management system. A planning child span
is also started via the SDK but not ended. The other child spans
AdmissionControl, QueryExecution, and Close are started and ended in
real time as those phases of the query lifecycle start/end.

Testing accomplished witg existing tests passing along with new ctest
and custom cluste tests added. The full EE test suite passed with
tracing enabled as part of the cluster start args.

Generated-by: Github Copilot (GPT-5.3-Codex)
Change-Id: I1425b32006f81586bf75c2e4045d23bab91e1611
---
M be/src/observe/CMakeLists.txt
A be/src/observe/buffered-span.cc
A be/src/observe/buffered-span.h
M be/src/observe/otel-flags-trace.cc
M be/src/observe/otel-test.cc
M be/src/observe/otel.cc
M be/src/observe/otel.h
A be/src/observe/span-manager-test.cc
M be/src/observe/span-manager.cc
M be/src/observe/span-manager.h
D be/src/observe/timed-span.cc
D be/src/observe/timed-span.h
M be/src/runtime/query-driver.cc
M be/src/service/client-request-state.cc
M be/src/service/client-request-state.h
M be/src/service/fe-support.cc
M be/src/service/impala-server.cc
M be/src/service/impala-server.h
M be/src/testutil/rand-util.h
M be/src/util/backend-gflag-util.cc
M common/thrift/BackendGflags.thrift
M fe/src/main/java/org/apache/impala/analysis/AnalysisContext.java
M fe/src/main/java/org/apache/impala/service/BackendConfig.java
M fe/src/main/java/org/apache/impala/service/FeSupport.java
M fe/src/main/java/org/apache/impala/service/Frontend.java
M tests/common/impala_test_suite.py
M tests/custom_cluster/test_otel_trace.py
M tests/util/cancel_util.py
M tests/util/otel_trace.py
29 files changed, 1,289 insertions(+), 809 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/77/23777/10
-- 
To view, visit http://gerrit.cloudera.org:8080/23777
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I1425b32006f81586bf75c2e4045d23bab91e1611
Gerrit-Change-Number: 23777
Gerrit-PatchSet: 10
Gerrit-Owner: Jason Fehr <jf...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <im...@cloudera.com>
Gerrit-Reviewer: Jason Fehr <jf...@cloudera.com>
Gerrit-Reviewer: Michael Smith <mi...@cloudera.com>
Gerrit-Reviewer: Quanlong Huang <hu...@gmail.com>
Gerrit-Reviewer: Riza Suminto <ri...@gmail.com>
Gerrit-Reviewer: Surya Hebbar <sh...@cloudera.com>
Gerrit-Reviewer: Yida Wu <wy...@gmail.com>