[trafficserver] branch 9.2.x updated: add a metric to track how often the range seek bug is detected (#8970)

[zwoop]

This is an automated email from the ASF dual-hosted git repository.

zwoop pushed a commit to branch 9.2.x
in repository https://gitbox.apache.org/repos/asf/trafficserver.git


The following commit(s) were added to refs/heads/9.2.x by this push:
     new bbeec4db2 add a metric to track how often the range seek bug is 
detected (#8970)
bbeec4db2 is described below

commit bbeec4db21c205b7306949f6a4814f79b92f9ec4
Author: Chris McFarlen <ch...@mcfarlen.us>
AuthorDate: Tue Jul 26 13:02:42 2022 -0500

    add a metric to track how often the range seek bug is detected (#8970)
    
    Co-authored-by: Chris McFarlen <cmcfar...@apple.com>
    (cherry picked from commit b23e8a0d1b042cc66833b47a2c2de2d74d171151)
---
 iocore/cache/Cache.cc          | 1 +
 iocore/cache/CacheRead.cc      | 2 ++
 iocore/cache/P_CacheInternal.h | 1 +
 3 files changed, 4 insertions(+)

diff --git a/iocore/cache/Cache.cc b/iocore/cache/Cache.cc
index 195143320..22b502aac 100644
--- a/iocore/cache/Cache.cc
+++ b/iocore/cache/Cache.cc
@@ -3088,6 +3088,7 @@ register_cache_stats(RecRawStatBlock *rsb, const char 
*prefix)
   REG_INT("read.active", cache_read_active_stat);
   REG_INT("read.success", cache_read_success_stat);
   REG_INT("read.failure", cache_read_failure_stat);
+  REG_INT("read.seek.failure", cache_read_seek_fail_stat);
   REG_INT("write.active", cache_write_active_stat);
   REG_INT("write.success", cache_write_success_stat);
   REG_INT("write.failure", cache_write_failure_stat);
diff --git a/iocore/cache/CacheRead.cc b/iocore/cache/CacheRead.cc
index 7cf8064e9..4c33cdf5d 100644
--- a/iocore/cache/CacheRead.cc
+++ b/iocore/cache/CacheRead.cc
@@ -749,6 +749,8 @@ CacheVC::openReadMain(int /* event ATS_UNUSED */, Event * 
/* e ATS_UNUSED */)
 
       doc->magic = DOC_CORRUPT;
 
+      CACHE_INCREMENT_DYN_STAT(cache_read_seek_fail_stat);
+
       CACHE_TRY_LOCK(lock, vol->mutex, mutex->thread_holding);
       if (!lock.is_locked()) {
         SET_HANDLER(&CacheVC::openReadDirDelete);
diff --git a/iocore/cache/P_CacheInternal.h b/iocore/cache/P_CacheInternal.h
index 8630d3a06..cf747de60 100644
--- a/iocore/cache/P_CacheInternal.h
+++ b/iocore/cache/P_CacheInternal.h
@@ -113,6 +113,7 @@ enum {
   cache_read_active_stat,
   cache_read_success_stat,
   cache_read_failure_stat,
+  cache_read_seek_fail_stat,
   cache_write_active_stat,
   cache_write_success_stat,
   cache_write_failure_stat,