Add exception message to 'failed to create output directory' #17951
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It looks like all of the similar code paths in this file properly attach the exception message to the error message, while this one does not. Omitting the message makes it hard to figure out the root cause. While there, make a minor error message string formatting improvement.
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I would receive reports of build failures along these lines: > ERROR: some/path/BUILD:156:32: Executing genrule //some/path:some_target failed: failed to create output directory '.../some/path/foo' In order to root cause this, I made a minor change to Bazel to extend its logging. See bazelbuild#17951. With that change applied, the error became: > ERROR: some/path/BUILD:156:32: Executing genrule //some/path:some_target failed: failed to create output directory '.../some/path/foo': .../some/path/foo (Not a directory) I was eventually able to reproduce this by manually creating an output file at bazel-bin/some/path/foo, followed by attempting to build the target. It looks like Bazel simply attempts to create output directories without taking into consideration whether a file already exists at the target location. This is problematic when someone alters an existing build target to emit a directory instead of a regular file. bb_clientd reports itself as being an ActionFileSystemType.REMOTE_FILE_SYSTEM. Based on the documentation for this enum value, I think this is correct. bb_clientd is capable of persisting information on previous builds and reloading it. This means that if a previous build yielded a regular file, a successive build would need to explicitly remove it before replacing it with an output directory. reateActionFsOutputDirectories() assumes that it doesn't need to do any cleanups. I therefore think it's only safe to use in case of ActionFileSystemType.IN_MEMORY_ONLY_FILE_SYSTEM. We should therefore only call it if !ActionFileSystemType.supportsLocalActions().
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I would receive reports of build failures along these lines: > ERROR: some/path/BUILD:156:32: Executing genrule //some/path:some_target failed: failed to create output directory '.../some/path/foo' In order to root cause this, I made a minor change to Bazel to extend its logging. See bazelbuild#17951. With that change applied, the error became: > ERROR: some/path/BUILD:156:32: Executing genrule //some/path:some_target failed: failed to create output directory '.../some/path/foo': .../some/path/foo (Not a directory) I was eventually able to reproduce this by manually creating an output file at bazel-bin/some/path, followed by attempting to build the target. It looks like Bazel simply attempts to create output directories without taking into consideration whether a file already exists at the target location. This is problematic when someone alters an existing build target to emit a directory instead of a regular file. Note that this only an issue when the remote action file system is used. Plain builds (ones that don't use Builds without the Bytes or bb_clientd) are unaffected. This change addresses this issue by reusing the same fallback path creation strategy that plain builds already use.
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@bazel-io fork 6.2.0 |
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Hi @justinhorvitz, Since I can see that this PR has been approved, please let me know whether I should proceed with importing it.Thanks! |
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@sgowroji yes you may proceed with importing thank you |
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I would receive reports of build failures along these lines: > ERROR: some/path/BUILD:156:32: Executing genrule //some/path:some_target failed: failed to create output directory '.../some/path/foo' In order to root cause this, I made a minor change to Bazel to extend its logging. See #17951. With that change applied, the error became: > ERROR: some/path/BUILD:156:32: Executing genrule //some/path:some_target failed: failed to create output directory '.../some/path/foo': .../some/path/foo (Not a directory) I was eventually able to reproduce this by manually creating an output file at bazel-bin/some/path, followed by attempting to build the target. It looks like Bazel simply attempts to create output directories without taking into consideration whether a file already exists at the target location. This is problematic when someone alters an existing build target to emit a directory instead of a regular file. Note that this only an issue when the remote action file system is used. Plain builds (ones that don't use Builds without the Bytes or bb_clientd) are unaffected. This change addresses this issue by reusing the same fallback path creation strategy that plain builds already use. Closes #17968. PiperOrigin-RevId: 523408378 Change-Id: I0d7559352687c317de72e0bf5bc6b5ba7452f97e
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I would receive reports of build failures along these lines: > ERROR: some/path/BUILD:156:32: Executing genrule //some/path:some_target failed: failed to create output directory '.../some/path/foo' In order to root cause this, I made a minor change to Bazel to extend its logging. See bazelbuild#17951. With that change applied, the error became: > ERROR: some/path/BUILD:156:32: Executing genrule //some/path:some_target failed: failed to create output directory '.../some/path/foo': .../some/path/foo (Not a directory) I was eventually able to reproduce this by manually creating an output file at bazel-bin/some/path, followed by attempting to build the target. It looks like Bazel simply attempts to create output directories without taking into consideration whether a file already exists at the target location. This is problematic when someone alters an existing build target to emit a directory instead of a regular file. Note that this only an issue when the remote action file system is used. Plain builds (ones that don't use Builds without the Bytes or bb_clientd) are unaffected. This change addresses this issue by reusing the same fallback path creation strategy that plain builds already use. Closes bazelbuild#17968. PiperOrigin-RevId: 523408378 Change-Id: I0d7559352687c317de72e0bf5bc6b5ba7452f97e
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It looks like all of the similar code paths in this file properly attach the exception message to the error message, while this one does not. Omitting the message makes it hard to figure out the root cause. While there, make a minor error message string formatting improvement. Closes bazelbuild#17951. PiperOrigin-RevId: 523461253 Change-Id: I96e434d0934c26ecc696cf386362ee17a6588cc5
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It looks like all of the similar code paths in this file properly attach the exception message to the error message, while this one does not. Omitting the message makes it hard to figure out the root cause. While there, make a minor error message string formatting improvement. Closes #17951. PiperOrigin-RevId: 523461253 Change-Id: I96e434d0934c26ecc696cf386362ee17a6588cc5 Co-authored-by: Ed Schouten <[email protected]>
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I would receive reports of build failures along these lines: > ERROR: some/path/BUILD:156:32: Executing genrule //some/path:some_target failed: failed to create output directory '.../some/path/foo' In order to root cause this, I made a minor change to Bazel to extend its logging. See #17951. With that change applied, the error became: > ERROR: some/path/BUILD:156:32: Executing genrule //some/path:some_target failed: failed to create output directory '.../some/path/foo': .../some/path/foo (Not a directory) I was eventually able to reproduce this by manually creating an output file at bazel-bin/some/path, followed by attempting to build the target. It looks like Bazel simply attempts to create output directories without taking into consideration whether a file already exists at the target location. This is problematic when someone alters an existing build target to emit a directory instead of a regular file. Note that this only an issue when the remote action file system is used. Plain builds (ones that don't use Builds without the Bytes or bb_clientd) are unaffected. This change addresses this issue by reusing the same fallback path creation strategy that plain builds already use. Closes #17968. PiperOrigin-RevId: 523408378 Change-Id: I0d7559352687c317de72e0bf5bc6b5ba7452f97e Co-authored-by: Ed Schouten <[email protected]>
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I would receive reports of build failures along these lines: > ERROR: some/path/BUILD:156:32: Executing genrule //some/path:some_target failed: failed to create output directory '.../some/path/foo' In order to root cause this, I made a minor change to Bazel to extend its logging. See bazelbuild#17951. With that change applied, the error became: > ERROR: some/path/BUILD:156:32: Executing genrule //some/path:some_target failed: failed to create output directory '.../some/path/foo': .../some/path/foo (Not a directory) I was eventually able to reproduce this by manually creating an output file at bazel-bin/some/path, followed by attempting to build the target. It looks like Bazel simply attempts to create output directories without taking into consideration whether a file already exists at the target location. This is problematic when someone alters an existing build target to emit a directory instead of a regular file. Note that this only an issue when the remote action file system is used. Plain builds (ones that don't use Builds without the Bytes or bb_clientd) are unaffected. This change addresses this issue by reusing the same fallback path creation strategy that plain builds already use. Closes bazelbuild#17968. PiperOrigin-RevId: 523408378 Change-Id: I0d7559352687c317de72e0bf5bc6b5ba7452f97e
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It looks like all of the similar code paths in this file properly attach the exception message to the error message, while this one does not. Omitting the message makes it hard to figure out the root cause. While there, make a minor error message string formatting improvement. Closes bazelbuild#17951. PiperOrigin-RevId: 523461253 Change-Id: I96e434d0934c26ecc696cf386362ee17a6588cc5
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It looks like all of the similar code paths in this file properly attach the exception message to the error message, while this one does not. Omitting the message makes it hard to figure out the root cause.
While there, make a minor error message string formatting improvement.