[pkg][fix] - Filter non-fatal errors and update go.mod (#5196)

* fix: update go.mod and test cases

* chore: update notice

* fix: go.mod

* fix: update notice

* fix: update notice, go.mod

* fix: update notice, go.mod

* fix: fix check

* fix: update notice, go.mod to v0.11.0

Author: VihasMakwana

NOTICE.txt

@@ -1475,11 +1475,11 @@ Contents of probable licence file $GOMODCACHE/github.com/elastic/elastic-agent-l
 
 --------------------------------------------------------------------------------
 Dependency : github.com/elastic/elastic-agent-system-metrics
-Version: v0.10.8
+Version: v0.11.0
 Licence type (autodetected): Apache-2.0
 --------------------------------------------------------------------------------
 
-Contents of probable licence file $GOMODCACHE/github.com/elastic/elastic-agent-system-metrics@v0.10.8/LICENSE.txt:
+Contents of probable licence file $GOMODCACHE/github.com/elastic/elastic-agent-system-metrics@v0.11.0/LICENSE.txt:
 
                                  Apache License
                            Version 2.0, January 2004

go.mod

@@ -15,7 +15,7 @@ require (
 	github.com/elastic/elastic-agent-autodiscover v0.8.1
 	github.com/elastic/elastic-agent-client/v7 v7.15.0
 	github.com/elastic/elastic-agent-libs v0.9.15
-	github.com/elastic/elastic-agent-system-metrics v0.10.8
+	github.com/elastic/elastic-agent-system-metrics v0.11.0
 	github.com/elastic/elastic-transport-go/v8 v8.6.0
 	github.com/elastic/go-elasticsearch/v8 v8.14.0
 	github.com/elastic/go-licenser v0.4.2

go.sum

@@ -782,8 +782,8 @@ github.com/elastic/elastic-agent-client/v7 v7.15.0 h1:nDB7v8TBoNuD6IIzC3z7Q0y+7b
 github.com/elastic/elastic-agent-client/v7 v7.15.0/go.mod h1:6h+f9QdIr3GO2ODC0Y8+aEXRwzbA5W4eV4dd/67z7nI=
 github.com/elastic/elastic-agent-libs v0.9.15 h1:WCLtuErafUxczT/rXJa4Vr6mxwC8dgtqMbEq+qWGD4M=
 github.com/elastic/elastic-agent-libs v0.9.15/go.mod h1:2VgYxHaeM+cCDBjiS2wbmTvzPGbnlXAtYrlcLefheS8=
-github.com/elastic/elastic-agent-system-metrics v0.10.8 h1:YoX3GfWWDtL5YrBkIbl7jQ/usOxBi+0N9jHke2EzFCk=
-github.com/elastic/elastic-agent-system-metrics v0.10.8/go.mod h1:3QiMu9wTKJFvpCN+5klgGqasTMNKJbgY3xcoN1KQXJk=
+github.com/elastic/elastic-agent-system-metrics v0.11.0 h1:/bWrgTsHZWLUhdT7WPNuQDFkrSfm+A4qf6QDQnZo9d8=
+github.com/elastic/elastic-agent-system-metrics v0.11.0/go.mod h1:3QiMu9wTKJFvpCN+5klgGqasTMNKJbgY3xcoN1KQXJk=
 github.com/elastic/elastic-transport-go/v8 v8.6.0 h1:Y2S/FBjx1LlCv5m6pWAF2kDJAHoSjSRSJCApolgfthA=
 github.com/elastic/elastic-transport-go/v8 v8.6.0/go.mod h1:YLHer5cj0csTzNFXoNQ8qhtGY1GTvSqPnKWKaqQE3Hk=
 github.com/elastic/go-docappender/v2 v2.2.1 h1:SxtmDwTPu4Smu8oggEojE/6QafNL1HJAwLDu7U7hZPA=

pkg/testing/fixture_install.go

@@ -379,7 +379,7 @@ func getProcesses(t *gotesting.T, regex string) []runningProcess {
 	}
 
 	_, pids, err := procStats.FetchPids()
-	if !assert.NoError(t, err, "error fetching process information") {
+	if err != nil && assert.Truef(t, errors.Is(err, agentsystemprocess.NonFatalErr{}), "error fetching process information: %v", err) {
 		// we failed a bit further
 		return nil
 	}

pkg/utils/watcher.go

@@ -5,6 +5,7 @@
 package utils
 
 import (
+	"errors"
 	"fmt"
 	"path/filepath"
 	"strings"
@@ -24,7 +25,8 @@ func GetWatcherPIDs() ([]int, error) {
 		return nil, fmt.Errorf("failed to initialize process.Stats: %w", err)
 	}
 	pidMap, _, err := procStats.FetchPids()
-	if err != nil {
+	if err != nil && !errors.Is(err, process.NonFatalErr{}) {
+		// return only if the error is fatal in nature
 		return nil, fmt.Errorf("failed to fetch pids: %w", err)
 	}
 	var pids []int