[pbs-devel] [PATCH proxmox-backup] server/worker_task: fix 'unknown' status for some big task logs

[Dominik Csapak <d.csapak@proxmox.com>]

when trying to parse the task status, we seek 8k from the end
which may be into the middle of a line, so the datetime parsing
can fail (when the log message contains ': ')
so try the next line when the first datetime parsing fails

if it was really a broken datetime, we now return either
the datetime of the next line or an 'Unknown' TaskState
(which was the fallback of most call sites anyway)

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
---
we could save the error for later returning, but
since that does not matter most of the time i did not do that
but if wanted i can send a v2 or fixup for that

 src/server/worker_task.rs | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/src/server/worker_task.rs b/src/server/worker_task.rs
index a9e4a36a..f6d12ac3 100644
--- a/src/server/worker_task.rs
+++ b/src/server/worker_task.rs
@@ -209,14 +209,25 @@ pub fn upid_read_status(upid: &UPID) -> Result<TaskState, Error> {
 
     let reader = BufReader::new(file);
 
+    let mut first_line = true;
     for line in reader.lines() {
         let line = line?;
 
         let mut iter = line.splitn(2, ": ");
         if let Some(time_str) = iter.next() {
-            endtime = chrono::DateTime::parse_from_rfc3339(time_str)
-                .map_err(|err| format_err!("cannot parse '{}': {}", time_str, err))?
-                .timestamp();
+            let dt_parse_res = chrono::DateTime::parse_from_rfc3339(time_str)
+                .map_err(|err| format_err!("cannot parse timestamp '{}': {}", time_str, err));
+            endtime = if first_line {
+                first_line = false;
+                match dt_parse_res {
+                    Ok(dt) => dt.timestamp(),
+                    // we maybe seeked into the middle of a line,
+                    // so ignore errors on the first
+                    Err(_) => continue,
+                }
+            } else {
+                dt_parse_res?.timestamp()
+            };
         } else {
             continue;
         }
-- 
2.20.1