prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  [transport] saltstack causes a final error trying to parse the package list from down nodes
  Down nodes for saltstack transport cause a final error for each down host after not being able to connect early on.
  
  Similar to the control_persist transport error:
  ```
  [store-2:__init__] Unable to open remote session: Timeout expires while trying to connect
  ```
  The saltstack transport errors slightly differently for nodes that are down:
  ```
  [store-2:read_file] Exception while reading /etc/os-release: Timeout expired executing salt --out json --static --no-color store-2 cmd.shell  'cat /etc/os-release'
  ```
  
  Then one additional error via `sys.stderr.write()` in `redhat.py` occurs for each down node:
  ```
  Could not obtain installed package list[root@EL8_supervisor ~]#
  ```
  
  _Originally posted by @TrevorBenson in https://github.com/sosreport/sos/issues/3456#issuecomment-1870554310_
  
  ----
  
  I'll try to diagnose why it differs from control_persist transport.
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `sos/collector/transports/saltstack.py`
  Content:
  ```
  1 # Copyright Red Hat 2022, Trevor Benson <trevor.benson@gmail.com>
  2 
  3 # This file is part of the sos project: https://github.com/sosreport/sos
  4 #
  5 # This copyrighted material is made available to anyone wishing to use,
  6 # modify, copy, or redistribute it subject to the terms and conditions of
  7 # version 2 of the GNU General Public License.
  8 #
  9 # See the LICENSE file in the source distribution for further information.
  10 
  11 import contextlib
  12 import json
  13 import os
  14 import shutil
  15 from sos.collector.transports import RemoteTransport
  16 from sos.collector.exceptions import (ConnectionException,
  17                                       SaltStackMasterUnsupportedException)
  18 from sos.utilities import (is_executable,
  19                            sos_get_command_output)
  20 
  21 
  22 class SaltStackMaster(RemoteTransport):
  23     """
  24     A transport for collect that leverages SaltStack's Master Pub/Sub
  25     functionality to send commands to minions.
  26 
  27     This transport will by default assume the use cmd.shell module to
  28     execute commands on the minions.
  29     """
  30 
  31     name = 'saltstack'
  32 
  33     def _convert_output_json(self, json_output):
  34         return list(json.loads(json_output).values())[0]
  35 
  36     def run_command(self, cmd, timeout=180, need_root=False, env=None,
  37                     use_shell=False):
  38         """
  39         Run a command on the remote host using SaltStack Master.
  40         If the output is json, convert it to a string.
  41         """
  42         ret = super(SaltStackMaster, self).run_command(
  43             cmd, timeout, need_root, env, use_shell)
  44         with contextlib.suppress(Exception):
  45             ret['output'] = self._convert_output_json(ret['output'])
  46         return ret
  47 
  48     def _salt_retrieve_file(self, node, fname, dest):
  49         """
  50         Execute cp.push on the remote host using SaltStack Master
  51         """
  52         cmd = f"salt {node} cp.push {fname}"
  53         res = sos_get_command_output(cmd)
  54         if res['status'] == 0:
  55             cachedir = f"/var/cache/salt/master/minions/{self.address}/files"
  56             cachedir_file = os.path.join(cachedir, fname.lstrip('/'))
  57             shutil.move(cachedir_file, dest)
  58             return True
  59         return False
  60 
  61     @property
  62     def connected(self):
  63         """Check if the remote host is responding using SaltStack Master."""
  64         up = self.run_command("echo Connected", timeout=10)
  65         return up['status'] == 0
  66 
  67     def _check_for_saltstack(self, password=None):
  68         """Checks to see if the local system supported SaltStack Master.
  69 
  70         This check relies on feedback from the salt binary. The command being
  71         run should always generate stderr output, but depending on what that
  72         output reads we can determine if SaltStack Master is supported or not.
  73 
  74         For our purposes, a host that does not support SaltStack Master is not
  75         able to run sos-collector.
  76 
  77         Returns
  78             True if SaltStack Master is supported, else raise Exception
  79         """
  80 
  81         cmd = 'salt-run manage.status'
  82         res = sos_get_command_output(cmd)
  83         if res['status'] == 0:
  84             return res['status'] == 0
  85         else:
  86             raise SaltStackMasterUnsupportedException
  87 
  88     def _connect(self, password=None):
  89         """Connect to the remote host using SaltStack Master.
  90 
  91         This method will attempt to connect to the remote host using SaltStack
  92         Master. If the connection fails, an exception will be raised.
  93 
  94         If the connection is successful, the connection will be stored in the
  95         self._connection attribute.
  96         """
  97         if not is_executable('salt'):
  98             self.log_error("salt command is not executable. ")
  99             return False
  100 
  101         try:
  102             self._check_for_saltstack()
  103         except ConnectionException:
  104             self.log_error("Transport is not locally supported. ")
  105             raise
  106         self.log_info("Transport is locally supported and service running. ")
  107         cmd = "echo Connected"
  108         result = self.run_command(cmd, timeout=180)
  109         return result['status'] == 0
  110 
  111     def _disconnect(self):
  112         return True
  113 
  114     @property
  115     def remote_exec(self):
  116         """The remote execution command to use for this transport."""
  117         salt_args = "--out json --static --no-color"
  118         return f"salt {salt_args} {self.address} cmd.shell "
  119 
  120     def _retrieve_file(self, fname, dest):
  121         """Retrieve a file from the remote host using saltstack
  122 
  123         Parameters
  124             fname       The path to the file on the remote host
  125             dest        The path to the destination directory on the master
  126 
  127         Returns
  128             True if the file was retrieved, else False
  129         """
  130         return (
  131             self._salt_retrieve_file(self.address, fname, dest)
  132             if self.connected
  133             else False
  134         )
  135 
  136 # vim: set et ts=4 sw=4 :
  137
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/sos/collector/transports/saltstack.py b/sos/collector/transports/saltstack.py
  --- a/sos/collector/transports/saltstack.py
  +++ b/sos/collector/transports/saltstack.py
  @@ -106,6 +106,8 @@
           self.log_info("Transport is locally supported and service running. ")
           cmd = "echo Connected"
           result = self.run_command(cmd, timeout=180)
  +        if result['status'] == 1:
  +            raise ConnectionException(self.address)
           return result['status'] == 0
   
       def _disconnect(self):
  
verification_info: {"golden_diff": "diff --git a/sos/collector/transports/saltstack.py b/sos/collector/transports/saltstack.py\n--- a/sos/collector/transports/saltstack.py\n+++ b/sos/collector/transports/saltstack.py\n@@ -106,6 +106,8 @@\n         self.log_info(\"Transport is locally supported and service running. \")\n         cmd = \"echo Connected\"\n         result = self.run_command(cmd, timeout=180)\n+        if result['status'] == 1:\n+            raise ConnectionException(self.address)\n         return result['status'] == 0\n \n     def _disconnect(self):\n", "issue": "[transport] saltstack causes a final error trying to parse the package list from down nodes\nDown nodes for saltstack transport cause a final error for each down host after not being able to connect early on.\r\n\r\nSimilar to the control_persist transport error:\r\n```\r\n[store-2:__init__] Unable to open remote session: Timeout expires while trying to connect\r\n```\r\nThe saltstack transport errors slightly differently for nodes that are down:\r\n```\r\n[store-2:read_file] Exception while reading /etc/os-release: Timeout expired executing salt --out json --static --no-color store-2 cmd.shell  'cat /etc/os-release'\r\n```\r\n\r\nThen one additional error via `sys.stderr.write()` in `redhat.py` occurs for each down node:\r\n```\r\nCould not obtain installed package list[root@EL8_supervisor ~]#\r\n```\r\n\r\n_Originally posted by @TrevorBenson in https://github.com/sosreport/sos/issues/3456#issuecomment-1870554310_\r\n\r\n----\r\n\r\nI'll try to diagnose why it differs from control_persist transport.\n", "before_files": [{"content": "# Copyright Red Hat 2022, Trevor Benson <trevor.benson@gmail.com>\n\n# This file is part of the sos project: https://github.com/sosreport/sos\n#\n# This copyrighted material is made available to anyone wishing to use,\n# modify, copy, or redistribute it subject to the terms and conditions of\n# version 2 of the GNU General Public License.\n#\n# See the LICENSE file in the source distribution for further information.\n\nimport contextlib\nimport json\nimport os\nimport shutil\nfrom sos.collector.transports import RemoteTransport\nfrom sos.collector.exceptions import (ConnectionException,\n                                      SaltStackMasterUnsupportedException)\nfrom sos.utilities import (is_executable,\n                           sos_get_command_output)\n\n\nclass SaltStackMaster(RemoteTransport):\n    \"\"\"\n    A transport for collect that leverages SaltStack's Master Pub/Sub\n    functionality to send commands to minions.\n\n    This transport will by default assume the use cmd.shell module to\n    execute commands on the minions.\n    \"\"\"\n\n    name = 'saltstack'\n\n    def _convert_output_json(self, json_output):\n        return list(json.loads(json_output).values())[0]\n\n    def run_command(self, cmd, timeout=180, need_root=False, env=None,\n                    use_shell=False):\n        \"\"\"\n        Run a command on the remote host using SaltStack Master.\n        If the output is json, convert it to a string.\n        \"\"\"\n        ret = super(SaltStackMaster, self).run_command(\n            cmd, timeout, need_root, env, use_shell)\n        with contextlib.suppress(Exception):\n            ret['output'] = self._convert_output_json(ret['output'])\n        return ret\n\n    def _salt_retrieve_file(self, node, fname, dest):\n        \"\"\"\n        Execute cp.push on the remote host using SaltStack Master\n        \"\"\"\n        cmd = f\"salt {node} cp.push {fname}\"\n        res = sos_get_command_output(cmd)\n        if res['status'] == 0:\n            cachedir = f\"/var/cache/salt/master/minions/{self.address}/files\"\n            cachedir_file = os.path.join(cachedir, fname.lstrip('/'))\n            shutil.move(cachedir_file, dest)\n            return True\n        return False\n\n    @property\n    def connected(self):\n        \"\"\"Check if the remote host is responding using SaltStack Master.\"\"\"\n        up = self.run_command(\"echo Connected\", timeout=10)\n        return up['status'] == 0\n\n    def _check_for_saltstack(self, password=None):\n        \"\"\"Checks to see if the local system supported SaltStack Master.\n\n        This check relies on feedback from the salt binary. The command being\n        run should always generate stderr output, but depending on what that\n        output reads we can determine if SaltStack Master is supported or not.\n\n        For our purposes, a host that does not support SaltStack Master is not\n        able to run sos-collector.\n\n        Returns\n            True if SaltStack Master is supported, else raise Exception\n        \"\"\"\n\n        cmd = 'salt-run manage.status'\n        res = sos_get_command_output(cmd)\n        if res['status'] == 0:\n            return res['status'] == 0\n        else:\n            raise SaltStackMasterUnsupportedException\n\n    def _connect(self, password=None):\n        \"\"\"Connect to the remote host using SaltStack Master.\n\n        This method will attempt to connect to the remote host using SaltStack\n        Master. If the connection fails, an exception will be raised.\n\n        If the connection is successful, the connection will be stored in the\n        self._connection attribute.\n        \"\"\"\n        if not is_executable('salt'):\n            self.log_error(\"salt command is not executable. \")\n            return False\n\n        try:\n            self._check_for_saltstack()\n        except ConnectionException:\n            self.log_error(\"Transport is not locally supported. \")\n            raise\n        self.log_info(\"Transport is locally supported and service running. \")\n        cmd = \"echo Connected\"\n        result = self.run_command(cmd, timeout=180)\n        return result['status'] == 0\n\n    def _disconnect(self):\n        return True\n\n    @property\n    def remote_exec(self):\n        \"\"\"The remote execution command to use for this transport.\"\"\"\n        salt_args = \"--out json --static --no-color\"\n        return f\"salt {salt_args} {self.address} cmd.shell \"\n\n    def _retrieve_file(self, fname, dest):\n        \"\"\"Retrieve a file from the remote host using saltstack\n\n        Parameters\n            fname       The path to the file on the remote host\n            dest        The path to the destination directory on the master\n\n        Returns\n            True if the file was retrieved, else False\n        \"\"\"\n        return (\n            self._salt_retrieve_file(self.address, fname, dest)\n            if self.connected\n            else False\n        )\n\n# vim: set et ts=4 sw=4 :\n", "path": "sos/collector/transports/saltstack.py"}], "after_files": [{"content": "# Copyright Red Hat 2022, Trevor Benson <trevor.benson@gmail.com>\n\n# This file is part of the sos project: https://github.com/sosreport/sos\n#\n# This copyrighted material is made available to anyone wishing to use,\n# modify, copy, or redistribute it subject to the terms and conditions of\n# version 2 of the GNU General Public License.\n#\n# See the LICENSE file in the source distribution for further information.\n\nimport contextlib\nimport json\nimport os\nimport shutil\nfrom sos.collector.transports import RemoteTransport\nfrom sos.collector.exceptions import (ConnectionException,\n                                      SaltStackMasterUnsupportedException)\nfrom sos.utilities import (is_executable,\n                           sos_get_command_output)\n\n\nclass SaltStackMaster(RemoteTransport):\n    \"\"\"\n    A transport for collect that leverages SaltStack's Master Pub/Sub\n    functionality to send commands to minions.\n\n    This transport will by default assume the use cmd.shell module to\n    execute commands on the minions.\n    \"\"\"\n\n    name = 'saltstack'\n\n    def _convert_output_json(self, json_output):\n        return list(json.loads(json_output).values())[0]\n\n    def run_command(self, cmd, timeout=180, need_root=False, env=None,\n                    use_shell=False):\n        \"\"\"\n        Run a command on the remote host using SaltStack Master.\n        If the output is json, convert it to a string.\n        \"\"\"\n        ret = super(SaltStackMaster, self).run_command(\n            cmd, timeout, need_root, env, use_shell)\n        with contextlib.suppress(Exception):\n            ret['output'] = self._convert_output_json(ret['output'])\n        return ret\n\n    def _salt_retrieve_file(self, node, fname, dest):\n        \"\"\"\n        Execute cp.push on the remote host using SaltStack Master\n        \"\"\"\n        cmd = f\"salt {node} cp.push {fname}\"\n        res = sos_get_command_output(cmd)\n        if res['status'] == 0:\n            cachedir = f\"/var/cache/salt/master/minions/{self.address}/files\"\n            cachedir_file = os.path.join(cachedir, fname.lstrip('/'))\n            shutil.move(cachedir_file, dest)\n            return True\n        return False\n\n    @property\n    def connected(self):\n        \"\"\"Check if the remote host is responding using SaltStack Master.\"\"\"\n        up = self.run_command(\"echo Connected\", timeout=10)\n        return up['status'] == 0\n\n    def _check_for_saltstack(self, password=None):\n        \"\"\"Checks to see if the local system supported SaltStack Master.\n\n        This check relies on feedback from the salt binary. The command being\n        run should always generate stderr output, but depending on what that\n        output reads we can determine if SaltStack Master is supported or not.\n\n        For our purposes, a host that does not support SaltStack Master is not\n        able to run sos-collector.\n\n        Returns\n            True if SaltStack Master is supported, else raise Exception\n        \"\"\"\n\n        cmd = 'salt-run manage.status'\n        res = sos_get_command_output(cmd)\n        if res['status'] == 0:\n            return res['status'] == 0\n        else:\n            raise SaltStackMasterUnsupportedException\n\n    def _connect(self, password=None):\n        \"\"\"Connect to the remote host using SaltStack Master.\n\n        This method will attempt to connect to the remote host using SaltStack\n        Master. If the connection fails, an exception will be raised.\n\n        If the connection is successful, the connection will be stored in the\n        self._connection attribute.\n        \"\"\"\n        if not is_executable('salt'):\n            self.log_error(\"salt command is not executable. \")\n            return False\n\n        try:\n            self._check_for_saltstack()\n        except ConnectionException:\n            self.log_error(\"Transport is not locally supported. \")\n            raise\n        self.log_info(\"Transport is locally supported and service running. \")\n        cmd = \"echo Connected\"\n        result = self.run_command(cmd, timeout=180)\n        if result['status'] == 1:\n            raise ConnectionException(self.address)\n        return result['status'] == 0\n\n    def _disconnect(self):\n        return True\n\n    @property\n    def remote_exec(self):\n        \"\"\"The remote execution command to use for this transport.\"\"\"\n        salt_args = \"--out json --static --no-color\"\n        return f\"salt {salt_args} {self.address} cmd.shell \"\n\n    def _retrieve_file(self, fname, dest):\n        \"\"\"Retrieve a file from the remote host using saltstack\n\n        Parameters\n            fname       The path to the file on the remote host\n            dest        The path to the destination directory on the master\n\n        Returns\n            True if the file was retrieved, else False\n        \"\"\"\n        return (\n            self._salt_retrieve_file(self.address, fname, dest)\n            if self.connected\n            else False\n        )\n\n# vim: set et ts=4 sw=4 :\n", "path": "sos/collector/transports/saltstack.py"}]}