Issues with bitbake for building Angstrom - angstrom-linux

The issue I'm having is that I'm trying to build an Angstrom image from scratch using bitbake (since Angstrom is now Yocto Compatible) but I've run into an error the moment I run the bitbake systemd-image
Traceback (most recent call last):
File "/usr/bin/bitbake", line 234, in <module>
ret = main()
File "/usr/bin/bitbake", line 197, in main
server = ProcessServer(server_channel, event_queue, configuration)
File "/usr/lib/pymodules/python2.7/bb/server/process.py", line 78, in __init__
self.cooker = BBCooker(configuration, self.register_idle_function)
File "/usr/lib/pymodules/python2.7/bb/cooker.py", line 76, in __init__
self.parseConfigurationFiles(self.configuration.file)
File "/usr/lib/pymodules/python2.7/bb/cooker.py", line 510, in parseConfigurationFiles
data = _parse(os.path.join("conf", "bitbake.conf"), data)
TypeError: getVar() takes exactly 3 arguments (2 given)
ERROR: Error evaluating '${TARGET_OS}:${TRANSLATED_TARGET_ARCH}:build-${BUILD_OS}:pn-${PN}:${MACHINEOVERRIDES}:${DISTROOVERRIDES}:${CLASSOVERRIDE}:forcevariable${#bb.utils.contains("TUNE_FEATURES", "thumb", ":thumb", "", d)}${#bb.utils.contains("TUNE_FEATURES", "no-thumb-interwork", ":thumb-interwork", "", d)}'
Traceback (most recent call last):
File "/usr/lib/pymodules/python2.7/bb/data_smart.py", line 116, in expandWithRefs
s = __expand_var_regexp__.sub(varparse.var_sub, s)
File "/usr/lib/pymodules/python2.7/bb/data_smart.py", line 60, in var_sub
var = self.d.getVar(key, 1)
File "/usr/lib/pymodules/python2.7/bb/data_smart.py", line 260, in getVar
return self.expand(value, var)
File "/usr/lib/pymodules/python2.7/bb/data_smart.py", line 132, in expand
return self.expandWithRefs(s, varname).value
File "/usr/lib/pymodules/python2.7/bb/data_smart.py", line 117, in expandWithRefs
s = __expand_python_regexp__.sub(varparse.python_sub, s)
TypeError: getVar() takes exactly 3 arguments (2 given)
ERROR: Error evaluating '${#bb.parse.BBHandler.vars_from_file(d.getVar('FILE'),d)[0] or 'defaultpkgname'}'
Traceback (most recent call last):
File "/usr/lib/pymodules/python2.7/bb/data_smart.py", line 117, in expandWithRefs
s = __expand_python_regexp__.sub(varparse.python_sub, s)
File "/usr/lib/pymodules/python2.7/bb/data_smart.py", line 76, in python_sub
value = utils.better_eval(codeobj, DataContext(self.d))
File "/usr/lib/pymodules/python2.7/bb/utils.py", line 387, in better_eval
return eval(source, _context, locals)
File "PN", line 1, in <module>
TypeError: getVar() takes exactly 3 arguments (2 given)
I've been at this for a while now, searching on different sites. Originally I tried following the guide at the developer section on the Angstrom site, but once I got some errors (prior to this one I'm putting here), I found Derek Molloy's site http://derekmolloy.ie/building-angstrom-for-beaglebone-from-source/ which solved those errors and gave a little more detail into the process.
Eventually I stumbled onto another forum post which decribed my problem, but unfortunately the answers weren't really clear (for me anyway) http://comments.gmane.org/gmane.linux.distributions.angstrom.devel/7431. I'm at a loss on what could be wrong, and I'm pretty much new to Yocto project so I'm unsure if there's any steps missing or something that's implicit that I have overlooked, so I would deeply appreciate anyone who could point me on the right direction on this.
As side note, I've been thinking that it could be something having to do with the environment-angstrom-... file that I have, since mine is environment-angstrom-v2013.12 and all the other examples use previous versions, I'm wondering if there's a new step involved when working with this.

Is there a reason why you are using a system-wide bitbake instead of the one that is compatible with that release of Angstrom?

Don't use a system-wide bitbake, as the bitbake API can and does change over time. Use the corresponding bitbake for that release of angstrom.
(This is breaking because your bitbake requires getVar to take three arguments but your angstrom layers are only passing two)

Related

No `test dataloader()` method defined to run Trainer.test while training Dreambooth-Stable-Diffusion

I'm implementing Dreambooth-Stable-Diffusion On Google Colab.
I was able to install coda replicate the same steps mentioned in the repo above, and generate the regulation images successfully. However, I'm getting pytorch_lightning.utilities.exceptions.MisconfigurationException: No test dataloader() method defined to run Trainer.test after running the Training command.
Here is the full log:
trainer.test(model, data)
File "/usr/local/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 911, in test
return self._call_and_handle_interrupt(self._test_impl, model, dataloaders, ckpt_path, verbose, datamodule)
File "/usr/local/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 685, in _call_and_handle_interrupt
return trainer_fn(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 954, in _test_impl
results = self._run(model, ckpt_path=self.tested_ckpt_path)
File "/usr/local/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 1128, in _run
verify_loop_configurations(self)
File "/usr/local/lib/python3.8/site-packages/pytorch_lightning/trainer/configuration_validator.py", line 42, in verify_loop_configurations
__verify_eval_loop_configuration(trainer, model, "test")
File "/usr/local/lib/python3.8/site-packages/pytorch_lightning/trainer/configuration_validator.py", line 186, in __verify_eval_loop_configuration
raise MisconfigurationException(f"No `{loader_name}()` method defined to run `Trainer.{trainer_method}`.")
pytorch_lightning.utilities.exceptions.MisconfigurationException: No `test_dataloader()` method defined to run `Trainer.test`.
I tried this solution - even though it was hard to know where to exactly put the edit and I'm not 100%, but still, it didn't work.

What is the recommended architecture for using amazon neptune in a scalable way?

I am building an application backed by a Neptune database. Because I want the application to be scalable, I am using AWS Lambda + API gateway to build a REST API to interact with the database. This seems to be a reasonable idea based on the fact that this use case is documented in the Neptune docs.
The Neptune docs recommend reusing the websocket connection to the database across the entire execution context of the function, which is what I am doing at the moment. The docs also recommend resetting the connection and retrying upon errors (see here), which I am also using. However, I am seeing exceptions every now and then (perhaps every 20 requests on average). One of the exceptions I get is
ConnectionResetError: Cannot write to closing transport
which seems to be the same as this issue.
The other one is:
Traceback (most recent call last):
File "/var/task/chalice/app.py", line 1685, in _get_view_function_response
response = view_function(**function_args)
File "/var/task/app.py", line 57, in resource
return Resource(app.current_request, g).process()
File "/var/task/backoff/_sync.py", line 94, in retry
ret = target(*args, **kwargs)
File "/var/task/chalicelib/handlers/resource.py", line 106, in get
values = resources.valueMap().with_(WithOptions.tokens).toList()
File "/var/task/gremlin_python/process/traversal.py", line 57, in toList
return list(iter(self))
File "/var/task/gremlin_python/process/traversal.py", line 47, in __next__
self.traversal_strategies.apply_strategies(self)
File "/var/task/gremlin_python/process/traversal.py", line 548, in apply_strategies
traversal_strategy.apply(traversal)
File "/var/task/gremlin_python/driver/remote_connection.py", line 63, in apply
remote_traversal = self.remote_connection.submit(traversal.bytecode)
File "/var/task/gremlin_python/driver/driver_remote_connection.py", line 60, in submit
results = result_set.all().result()
File "/var/lang/lib/python3.7/concurrent/futures/_base.py", line 435, in result
return self.__get_result()
File "/var/lang/lib/python3.7/concurrent/futures/_base.py", line 384, in __get_result
raise self._exception
File "/var/task/gremlin_python/driver/resultset.py", line 90, in cb
f.result()
File "/var/lang/lib/python3.7/concurrent/futures/_base.py", line 428, in result
return self.__get_result()
File "/var/lang/lib/python3.7/concurrent/futures/_base.py", line 384, in __get_result
raise self._exception
File "/var/lang/lib/python3.7/concurrent/futures/thread.py", line 57, in run
result = self.fn(*self.args, **self.kwargs)
File "/var/task/gremlin_python/driver/connection.py", line 82, in _receive
data = self._transport.read()
File "/var/task/gremlin_python/driver/aiohttp/transport.py", line 104, in read
raise RuntimeError("Connection was already closed.")
RuntimeError: Connection was already closed.
In case it is relevant, I am using gremlingpython==3.5.1
It seems to me that these issues are all ultimately a consequence of using AWS Lambda, namely due to the mismatch between the longevity of websocket connections and the ephemeral nature of lambda execution contexts. The question then is: Am I doing the wrong thing by trying to use AWS lambda for my API? Would it be more appropriate to setup an EC2 instance and deal with the scalability in some other way?
P.S. Previously I did create and close a connection in every function execution (as previously recommended in the Neptune docs), which did work fine but was naturally slow.
The latest version of Neptune only supports Gremlin 3.4.11 (https://docs.aws.amazon.com/neptune/latest/userguide/engine-releases-1.0.5.1.html). I would start by using gremlin-python 3.4.11 and see if that resolves your issue. Gremlin-python 3.5 replaced Tornado with AIO HTTP (ref) for websocket connections and I suspect that change may be causing a slight change in behavior that a future release supporting Gremlin 3.5 will address.
I wonder whether the 'Connection was already closed' error message is not being treated as a retriable error by the retry logic?
What happens if you add this error message to the list of retriable_error_msgs in the Python example in the docs?

Spacy \ Matcher \ set membership throws an exception

I use Spacy 2.7:
Following the Set Membership example:
I tried the below with the IN logic - simple list of words...
doc = nlp(SOME_TEXT)
matcher = Matcher(nlp.vocab)
pattern = [{'LOWER': {'IN' : ["i","you","we","they"]}}]
matcher.add("myPattern",None, pattern)
matches = matcher(doc)
...
Get an exception
would:[{'LOWER': {'IN': ['i', 'you', 'we', 'they']}}] with index 0
Traceback (most recent call last):
File "test.py", line 85, in <module>
matcher.add(key,None, curr)
File "matcher.pyx", line 266, in spacy.matcher.Matcher.add
File "matcher.pyx", line 99, in spacy.matcher.init_pattern
TypeError: an integer is required
Went to the open source file (matcher.pyx) - in line 99, not sure what is the bug, or maybe I used that incorrect..
Sorry if this was confusing – but the GitHub thread you're referring to is still only the spec and proposal, i.e. the planned implementation. The changes will hopefully ship with spaCy v2.1.0 (since some of the changes to the Matcher internals are not fully backwards compatible).

Using LineReciever with Twisted Process protocols

I'm trying to use twisted to handle data generated by a binary (which indefinitely dumps lines onto stdout). Since by data is inherently line-delimited, I was trying to used the LineReciever instead of trying to parse data. The following is the relevant bit of the code which seems to be causing trouble :
class ProtocolBareQDAL41xB(ProcessProtocol, LineReceiver):
...
def outReceived(self, data):
print "Got Data:" + repr(data)
self.dataReceived(data)
def lineReceived(self, line):
print "Got Line: " + line
self._process_line(line)
...
This 'works' for the first of two lines in the output. I don't know yet if it works for only one line, or if it works for all but the last line. The resulting output looks something like :
$ python BareQDAL41xB.py
Made Connection
<Process pid=16486 status=-1>
Got Data:'No device found!\nMultiple devices found! Please connect only one.\n'
Got Line: No device found!
Got Serial Number : found!
Unhandled Error
Traceback (most recent call last):
File "/media/ldata/code/virtualenvs/tendril/local/lib/python2.7/site-packages/twisted/python/log.py", line 101, in callWithLogger
return callWithContext({"system": lp}, func, *args, **kw)
File "/media/ldata/code/virtualenvs/tendril/local/lib/python2.7/site-packages/twisted/python/log.py", line 84, in callWithContext
return context.call({ILogContext: newCtx}, func, *args, **kw)
File "/media/ldata/code/virtualenvs/tendril/local/lib/python2.7/site-packages/twisted/python/context.py", line 118, in callWithContext
return self.currentContext().callWithContext(ctx, func, *args, **kw)
File "/media/ldata/code/virtualenvs/tendril/local/lib/python2.7/site-packages/twisted/python/context.py", line 81, in callWithContext
return func(*args,**kw)
--- <exception caught here> ---
File "/media/ldata/code/virtualenvs/tendril/local/lib/python2.7/site-packages/twisted/internet/posixbase.py", line 597, in _doReadOrWrite
why = selectable.doRead()
File "/media/ldata/code/virtualenvs/tendril/local/lib/python2.7/site-packages/twisted/internet/process.py", line 274, in doRead
return fdesc.readFromFD(self.fd, self.dataReceived)
File "/media/ldata/code/virtualenvs/tendril/local/lib/python2.7/site-packages/twisted/internet/fdesc.py", line 94, in readFromFD
callback(output)
File "/media/ldata/code/virtualenvs/tendril/local/lib/python2.7/site-packages/twisted/internet/process.py", line 277, in dataReceived
self.proc.childDataReceived(self.name, data)
File "/media/ldata/code/virtualenvs/tendril/local/lib/python2.7/site-packages/twisted/internet/process.py", line 931, in childDataReceived
self.proto.childDataReceived(name, data)
File "/media/ldata/code/virtualenvs/tendril/local/lib/python2.7/site-packages/twisted/internet/protocol.py", line 604, in childDataReceived
self.outReceived(data)
File "BareQDAL41xB.py", line 104, in outReceived
self.dataReceived(data)
File "/media/ldata/code/virtualenvs/tendril/local/lib/python2.7/site-packages/twisted/protocols/basic.py", line 573, in dataReceived
self.transport.disconnecting):
exceptions.AttributeError: 'Process' object has no attribute 'disconnecting'
processExited, status 0
processEnded, status 0
LineReciever seems to be expecting the transport to implement disconnecting.
Is it possible to use twisted's LineReciever with twisted's ProcessProtocol, or should I implement the line parser in my protocol instead?
LineReceiver is already a Protocol, which implements different interfaces than IProcessProtocol.
Luckily, recent versions of Twisted already contain an adapter that does what you want - which is to treat a subprocess as a stream of bytes. Rather than calling spawnProcess directly, use ProcessEndpoint, and you can pass a regular ProtocolFactory, no ProcessProtocol involved.
However, as a commenter has already pointed out, there's a bug here, where the disconnecting attribute is not formally part of ITransport, but LineReceiver (and LineOnlyReceiver) depend on it anyway, and since it's not part of the interface, ProcessEndpoint doesn't implement it. That should definitely be fixed, but in the meanwhile, we'll need to work around it.
As a happy accident, Twisted's built-in support for wrapping protocols, WrappingFactory, already has support for the disconnecting attribute, specifically because of this ugly disparity between the theory of the interface specifications and the reality of the most popular ITransport implementations. So even a do-nothing wrapper will work around the problem. You can implement this like so:
from zope.interface import implementer
from twisted.internet.interfaces import IStreamClientEndpoint
from twisted.protocols.policies import WrappingFactory
#implementer(IStreamClientEndpoint)
class DisconnectingWorkaroundEndpoint(object):
def __init__(self, endpoint):
self._endpoint = endpoint
def connect(self, protocolFactory):
return self._endpoint.connect(WrappingFactory(protocolFactory))
and then when you construct your ProcessEndpoint, do:
endpoint = DisconnectingWorkaroundEndpoint(ProcessEndpoint(...))
Sorry for the delay on answering; while you've probably worked out your own workaround, I hope this will be useful to others with the same question!

VARCHAR requires a length when rendered on MySQL

I have a buildout instance with pas.plugins.sqlalchemy. It appears in installation list but when installing it results in an error.
Here's the ZCML definition:
<configure xmlns="http://namespaces.zope.org/zope" xmlns:db="http://namespaces.zope.org/db">
<include package="z3c.saconfig" file="meta.zcml" />
<db:engine xmlns="http://namespaces.zope.org/db" name="pas" url="mysql://webadmin:password#rcs-mysql-dev/estep" />
<db:session xmlns="http://namespaces.zope.org/db" name="pas.plugins.sqlalchemy" engine="pas" />
</configure>
Traceback is:
Traceback (innermost last):
Module ZPublisher.Publish, line 127, in publish
Module ZPublisher.mapply, line 77, in mapply
Module ZPublisher.Publish, line 47, in call_object
Module Products.CMFQuickInstallerTool.QuickInstallerTool, line 575, in installProducts
Module Products.CMFQuickInstallerTool.QuickInstallerTool, line 512, in installProduct
- __traceback_info__: ('pas.plugins.sqlalchemy',)
Module Products.GenericSetup.tool, line 330, in runAllImportStepsFromProfile
- __traceback_info__: profile-pas.plugins.sqlalchemy:install
Module Products.GenericSetup.tool, line 1085, in _runImportStepsFromContext
Module Products.GenericSetup.tool, line 999, in _doRunImportStep
- __traceback_info__: pas.plugins.sqlalchemy.install
Module pas.plugins.sqlalchemy.setuphandlers, line 46, in install
Module sqlalchemy.schema, line 2148, in create_all
Module sqlalchemy.engine.base, line 1698, in create
Module sqlalchemy.engine.base, line 1740, in _run_visitor
Module sqlalchemy.sql.visitors, line 83, in traverse_single
Module sqlalchemy.engine.ddl, line 42, in visit_metadata
Module sqlalchemy.sql.visitors, line 83, in traverse_single
Module sqlalchemy.engine.ddl, line 58, in visit_table
Module sqlalchemy.engine.base, line 1191, in execute
Module sqlalchemy.engine.base, line 1241, in _execute_ddl
Module sqlalchemy.sql.expression, line 1413, in compile
Module sqlalchemy.engine.base, line 702, in compile
Module sqlalchemy.engine.base, line 715, in process
Module sqlalchemy.sql.visitors, line 54, in _compiler_dispatch
Module sqlalchemy.sql.compiler, line 1152, in visit_create_table
Module sqlalchemy.dialects.mysql.base, line 1282, in get_column_specification
Module sqlalchemy.engine.base, line 761, in process
Module sqlalchemy.sql.visitors, line 54, in _compiler_dispatch
Module sqlalchemy.sql.compiler, line 1450, in visit_string
Module sqlalchemy.dialects.mysql.base, line 1520, in visit_VARCHAR
InvalidRequestError: VARCHAR requires a length when rendered on MySQL
you need to specify lengths for all Strings. That means: String(n) instead of simply String. So, in pas.plugins.sqlalchemy.model.User
login = Column(String, unique=True)
becomes
login = Column(String(100), unique=True)
etc...
I don't have a MySQL installation, and pas.plugins.sqlalchemy works fine on postgresql for me, but it would seem that the authors have made an assumption about varchars. Assuming it's not something that SQLAlchemy should be handling itself (it would be really nice if the MySQL dialect for SQLalchemy would select an appropriate maximum size for unbounded varchars), I'll see if I can commit a fix this evening.
A quick glance at the code shows that all "String" (treated as varchar by the database) fields have maximum lengths except Login, name and password in the User table and name in the Group table, and there's no good reason why these should be different.
Update: Check out https://svn.plone.org/svn/collective/PASPlugins/pas.plugins.sqlalchemy/branches/auspex from subversion. It's my version of pas.plugins.sqlalchemy with support for the IGroupCapability interface (lets users be added to and removed from groups that are also stored in the rdb), and I've also added lengths to all unbounded String fields.
If you don't know how to use subversion checkouts in buildout, see: http://pypi.python.org/pypi/mr.developer/